I just spent 4 days at a conference, so my review is mainly of that.
Hotel rooms- Very comfortable. I've heard from some that high winds rattle the window and whistle down the air shafts, keeping them awake at night; but I faced the other side and didn't have that problem (Still heard it, though). My view was of the Bellagio fountain display, which I highly recommend asking for. I must add: the water quality here is TERRIBLE, and the body lotion set in your room is basically water. If you are staying for any length of time, bring your own industrial strength moisturizer.
Casino. Very generous. If you know when to stop, many of my coworkers won nicely. Also, doesn't have that 'I'm in tourist land' feel that most places struggle with.
Conference rooms. Spacious, tasteful. Some issue with maintaining a comfortable temperature. My biggest complaint is with the food. Do you like starch? Then you're in luck. But if fruits and veggies are part of your food pyramid you might want to bring your own.
Decor. It grew on me. You'll love the elevator moving pictures. Lots of sparkle throughout.
Location. Served my purposes. Access to sky walks so getting across the main street is a breeze.