soli- The Rio is a nice property and has a lot of things to do. The sportsbook is pretty much the same as most others to watch games but from a betting standpoint, the Rio sportsbook is a joke. They have the basic stuff and nothing more. It's a Harrah's property so that pretty much says it all right there.
prime21- Asking what the best sportsbook in Las Vegas is kind of tough because Las Vegas casinos got out of the gambling business years ago. I would have to say the Las Vegas Hilton has the best sportsbook. They put a lot of stuff on the board and it's also a good place to watch the games.