AncestryDNA

As I continue to research my ancestry through DNA, using various tools and services, and gaining experience and perspective, my views of DNA services evolve. These are my thoughts about AncestryDNA at this time, nearly three years into my DNA research. (Note: though I use the name AncestryDNA to distinguish the DNA matching service from the record searching service, both are accessed through the address ancestry.com, and the services are closely linked. AncestryDNA clients get many notifications of digitized records and family trees available with paid subscriptions to the Ancestry.com historical records service.)

Pros:

(1) AncestryDNA has a large number of DNA contributors, so a large opportunity for connecting with cousins whose common ancestry could help extend your own known ancestry. I have found, though, that Ancestry has more "closer" connections in some of my ancestor branches and fewer in other branches, compared to DNA matches in other DNA services.

(2) AncestryDNA, through its sister genealogy research service, Ancestry.com, has access to family trees for many of its DNA customers. AncestryDNA furnishes a five generation summary tree (just names and lifespan years, organized in a tree) for those matches who have posted a tree and allow it to be "public". For those trees that are not public, it is easy to request viewing privileges. I find that about half will not grant privileges (protecting privacy) and half will (collaborating on research). Also, once you are granted access, AncestryDNA conveniently keeps all trees to which you have access in a convenient tree drop-down list.

(3) AncestryDNA provides a list of DNA matches in common (ICW), though more limited than other services.

(4) You may post a limited tree and link it to your DNA so that others may search for family connections. (Available to AncestryDNA customers, though I don't know if it is available to other Ancestry.com subscribers who are not DNA matches.) After a certain size, a fee is charged for hosting the tree.

(5) If you choose to post a family tree, AncestryDNA has two related analysis features that help identify common ancestors: ThruLines and Common Ancestor. These tools basically compare your tree to those of your DNA matches and shows you how you are related, sometimes piecing together parts of several different trees to create the path. Even though these tools don't generally show me the ancestries I'm most interested in, they do identify which ancestor branch the DNA match belongs to, and allows me to focus my work on those (usually different) branches that are of most interest to me. The most useful result from these tools, so far, has been confirming a relationship between my Patchens and an old, well-researched Patchen family, and introducing relatives in a recently discovered ancestor so that I have found distant cousins that will help add a new branch of descendants to my tree, if I decide to pursue that. (I'm much less interested in finding cousins, aka other descendants of common ancestors, than I am in discovering new ancestors.)

(6) AncestryDNA is available independent of Ancestry.com . I initially stayed away from AncestryDNA because ... well, originally because I have strong reservations about posting DNA in public places. But in addition to that, I assumed that in order to have access to DNA matches, I would have to subscribe to the ancestry.com service which, as a long time researcher, I find expensive and of very limited use. This is not the case. A DNA analysis costs about $100 (often on sale for about $60?) and this includes access to the DNA matching for as long as you leave your DNA hosted on the AncestryDNA service.

(7) AncestryDNA provides very easy granting of privileges for sharing your DNA information. For example, though some of my DNA analyses were done by others, they have been able to easily grant me a management role, allowing me to research and annotate DNA matches, and post related family tree data.

(8) The annotation features are better than for other services. You can assign a prominent star for relationships established and color coded dots for various branches of your family, and it's up to you to decide how you want to use the star and dots. You can also attach a note, say a detail of how your related, or a suspected branch. All of this is visible in search results, making it very valuable for keeping track of your research.

(9) AncestryDNA has probably more experience than most  in estimating ethnicity (geographic origins) from DNA. Their estimates are fairly detailed. I would say, however, that our ancestry is fairly homogeneous (predominantly Irish and English, completely western European) and it is very difficult to isolate geographic origins from DNA. So I think their estimates are pretty good, but should be viewed as approximate. I attribute better accuracy to my genealogy research. From time to time, they change their estimates as they tweak their algorithm.

(10) You can indicate in a profile your research interests, outside links, languages spoken, etc. This is useful for giving a link to a family tree located outside of Ancestry.com .

Cons:

(1) Unlike the other services I've used (so far GEDMatch, 23andMe, MyHeritage), AncestryDNA does not allow you to download your match information. (They do allow you to download the DNA analysis.) So if you wish to perform some DNA analysis outside of AncestryDNA that involves matches, you must hand transcribe each match. Some data "harvesters" have been developed to make this transcription and analysis, and research management, easier, but Ancestry recently threatened them with legal action and they have abandoned their support of Ancestry data. (Harvester can no longer facilitate the painstaking transcription of family trees, for comparison with those of other matches, either.)

(2) Unlike the other services I've used, AncestryDNA does not show details of DNA segments that you share with your DNA matches. Since these segments are inherited, their identity can help identify your common ancestry.

(3) AncestryDNA does not identify "triangulations", only "ICW". (ICW is a list of matches you have In Common With one of your matches. In other words, ICW is the intersection of your list of matches and the list of matches of one of your DNA matches.) Triangulation is stronger proof of a common ancestor than is ICW.

(4) If your family tree already goes back several generations, like mine, the five generation tree shown by AncestryDNA is inadequate for finding a common connection. [To get deeper access, there are two options: (a) subscribe to Ancestry.com, or (b) try to find the matches full tree through your library's access (during Covid shutdowns, may be available from your home computer).]

(5) Searches results among DNA matches and your list of ICW are limited to matches sharing 20cM or more of DNA. Fourth cousins share on average about 13cM, so the AncestryDNA limits your searches to those more closely related than fourth cousins, or to common ancestors back only four generations. If you have a well-researched tree, you probably know history back to your immigrant ancestors, in my case four or more generations. AncestryDNA makes it more difficult to research more distant ancestors, a severe limitation.

(6) AncestryDNA does allow you to view matches down to 8cM in your unfiltered, unsearched, list of DNA matches. Other services allow down to 6cM. I've made several connections with 6cM shared DNA. On AncestryDNA, actually. It was just recently that they raised their lower limit to 8cM.

(7) Messaging, especially if you are managing someone else's DNA, is "clunky". Since I'm not a subscriber to ancestry.com, I frequently get messages that I must join to send messages. However, if you click in other places, you are allowed to send a message. If I'm managing someone else's DNA,  I don't think the DNA match I am writing about is shown in my message, so I'm careful to describe how I am related to the DNA, and why I may be requesting access to a family tree. Also, when I try to find messages already sent, I find it difficult to find what I'm looking for, often resorting to scrolling through all sent messages until I find what I'm looking for. With MyHeritage and 23andMe, when I click on a message button, I'm shown the thread of previous communications. As with other services, I usually include an outside e-mail address because that is more usually more convenient, especially if you wish to share documents or communicate with more than one person at a time.

Overall, I generally recommend this service, especially if you are not trying to extend an already well-developed ancestry, or relying on outside tools to analyze and keep track of your research from multiple services.