I like Harrah's. The rooms are pretty nice and I love the centralized location. The table's pay pretty good too. It'a actually an easy hotel to navigate, considering the plan is to keep you in. They have a shuttle to Rio so check that out too.
I had a wonderful stay here, clean rooms with average size. The casino was lively, and had a wonderful atmosphere. The best part though, you could stay here cheap, and spend all your time at Caesars, The Mirage, or the Venitian, all which are basically a 2 minute walk or less. While the restuarant options are average (range is vastly overrated), you can enjoy the best at the other hotels without batting an eye. If you get a roomer on the 6th floor or higher facing the strip, wonderful view. Lower floors have no view.