I haven't been to the Vegas locations, but Harrahs has their hotel, Caesars Palace and Paris Las Vegas there. I've stayed at the Caesars in Atlantic City, and the Harrahs in Tunica, both comp trips that I earned from play at the Cherokee Harrahs (and I'm certainly no high roller). The Caesars in AC was so luxurious...very nice. The great thing about staying at their hotels and playing in their casinos is the Total Rewards program, which got me some nice comp trips, including airfare. They even offered me a comp trip to Lake Tahoe for 2, for 5 nights, last year, but my work schedule wouldn't let me go. They have locations all over the country, and your players card gets you points at all the locations, which is nice.
The Harrahs.com website has lots of info about their Vegas hotels.
Sorry so long winded, but I really do love their hotels and player rewards!