This is one of my favorite sportsbooks in town. They have done a bit of remodeling to the casino hotel and also to the sports book as well. You can watch games on both Projection and LCD screens, there's in game betting, and nice bar that sits right off to the side of the sportsbook.
Hard Rock Sportsbook gets pretty live. Especially for the big games.
I came two weeks ago to place some bets (since I was staying across the street at Hyatt Place) and didn't have any problems. It was the first week of the NFL season, so of course the lines were pretty long. But as the season goes on, the lines start to get shorter. Staff was friendly, drinks were alright and there's plenty of seating. (People are always going in and out. So you should be able to find a seat or two)
I had fun when I was there. This is one of those places that I will definitely frequent to watch or bet on a game.
Give it a shot and let me know what you think! :)