Why Play Americas Cardroom?
America's Cardroom is becoming one of my favourite poker rooms. They have excellent software and a good selection of tournaments including many $100k and $1M guaranteed tournaments. The action on ACR is some of the softest we've ever seen, which means a lot of money can be made here. It is also one of the few sites available to US players which offers reliable action.
In short, this is the best site for American players. Or if you like playing American players, this is the site for you.