So, my review may be a little bit skewed. My mom is a Diamond Rewards member with Harrah's, which owns Caesars, so my experiences here have always been FABULOUS.
We stayed in a great room in the Augustus Tower, which had an AWESOME view of the Bellagio Fountains. It was exceptional. The floor was also nice and quiet, considering it was packed.
We ordered room service a couple of times - they were surprisingly quick, and the food was good.
The customer service was exceptional - from check in to check out, and everything between, we were treated exceptionally well.
Perks to Diamond membership? Skipping the line at the buffet!! The line was literally over an hour wait, and we walked right up and were seated. Awesome.