I have had an account with Ancestry.com since Mar 2002, that is 15 years folks. Some of that time was via a membership and other times not. My mother did a DNA test through Ancestry.com and she also got one for me, a few months later. When my mother first got her test results, I was able to see the PUBLIC family trees managed by people who were related to my mother. A lot of people don't have them but it was nice to have the option to browse DNA matches tree.
A few months later I did my DNA test through Ancestry.com and guess what. Yep, I couldn't view the family trees from anyone except my own. When I click on the link, it sends me automatically to a membership screen (see below). All I wanted to view was a tree that someone created and posted in the public trees. Why does this require a subscription? Why does Ancestry think that my research should only be viewed by members?
Since my DNA results are there, I do still have an account. But I will not be purchasing a membership anytime soon. Frankly, Ancestry has gotten so huge that even a basic search returns too many results to manage because it includes tons of internet sites as well. So if you are interested in finding relatives via DNA testing, I would recommend using a different company.
UPDATE: Aug 20th - just found out why my mother could view trees and not me. Nothing was changed by Ancestry EXCEPT my mother actually bought a membership. I'm not even sure she knows what that means. So still would not recommend Ancestry.com DNA.