See my review for Adult Friend Finder as it is the same company.
A legitimate site run as well as could be expected. Unfortunately the site is overrun with prostitutes. The people who run the site will remove a prostitute when they uncover one but they are swamped with them. Just be careful and you should be able to pick out the legit members from the "play for pay" variety as the legit members will answer your email questions specifically. The hookers will just write back saying they've had a hard week and can't wait for the weekend to meet you (no matter WHAT you've written)
Pros
Good site run by good people.
Cons
WAYYYYY too many hookers.
When you go to Ashley Madison just be careful. You have to buy credits in large somewhat expensive "lumps". These credits are used when contacting other members. They also have a "wink" you can send for free, the idea being if the person you winked at is interested in you they will send an email (which you pay for). In 3 cases, when I sent a wink an email came back asking if I was online. Being new I didn't know how to respond and because I thought the response showed interest, I sent each a legitimate email (10 credits each) which they never bothered to respond to. So there ARE people on there who sole purpose is to dwindle your credits. If you get an email asking if you "are online" do not respond and you should be fine.
Pros
Can't think of many.
Cons
A LOT of "members" haven't been there for over 3 months and are not contactable.