UB recently merged with AP to form Cereus, creating one of the largest poker networks available to Americans. Several people prefer other US poker sites to UB due to a scandal that occurred around 2008, but UB made amends and is trying to put that behind them now.
If you are a Mac user, you have two great options. UB has supported a Flash version of their site for quite a long time. If you want to download a program, Ultimate Bet for Mac is the right choice for you.
UB offers great games for both tournament and ring players. You should get a Full Tilt Poker download if you are looking for good traffic at nosebleed stakes, but low stake players will be quite happy with the game selection. If you are interested in more info regarding UB, be sure to take a look at the entries on this site. I update with new content on a regular basis!
