This might be a better discussion for the "poker rooms" section of forums. You can also find many other discussions there about user opinions and experiences with ACR as well as many other U.S.
poker sites.
In my opinion, ACR is a decent place to play, but I wouldn't necessarily say it is "fishy" by any means. I do enjoy the abundance of Tournaments to select from, and the ACR Stormers (twitch) + CardsChat have home games and lots of
freerolls which present good value.
Just stay away from the crazy long late reg games (3-5 hrs) unless you have that kind of time.
Go play at
ignition/Bovada if you want to find some "fun (bad) players". Ignition is anonymous players, so no one player can accurately note or track another players stats on there. This makes the room unattractive for regs and more attractive to newbies. Also places like that, which are primarily Sports Betting clients but also offer poker, can be lucrative because you will run into the Sports Betting crowd that usually doesn't spend time on the poker tables.
I very much enjoy playing at BetOnline/SB as well. You can find some recreational players there for sure. Hope this helps