My review is biased since I'm platinum =)
I took out a suite here for the weekend, and I must say, I was rather impressed with everything. Room was definitely unique and there's just so much random crap in the room that it made me laugh. Fridge items are weight-sensored so be aware of that when checking out. Bed is surprisingly comfortable. If possible, try to stay in the west tower with a view of the Bellagio fountains...it's well worth it.
Service was top notch. I was treated like royalty. It was a busy weekend, so some things did slip by and I had to call down to the front desk to make requests more than once on a couple occasions.
Yes, they do charge for wifi, but there's a free access "community" password if you want to use it ;)
For my Marriott platinum friends: free wifi, free roll away bed request, +500 Marriott points arrival gift