I recently stopped my $30 per month account at ancestry.com and started using the free 6 month subscription I received when I purchased Family Tree last year. And when my 6 free months is up, I likely won't sign up for ancestry.com again anytime soon for a couple reasons. First, at times I feel like I've gone as far as I can with on-line research with a site like ancestry. And secondly, $30 per months is a lot of money. I think I can put that money to use elsewhere.
However, I won't be lost without ancestry.com because of familysearch.org. This site has allowed me access to nearly as much information as ancestry.com and it's all for free. There may come a time when I have to re-up my ancestry.com subscription, but for now, I'm comfortable saving a few bucks.