This is really a 3.5 but I rounded up because the staff is so friendly. Its hard to stay in a penthouse suite at the bellagio and then staying at any other penthouse suite and not let that influence my review.
We stayed in the penthouse suite, it was about half the size of the bellagio's. Yes, I realize that the Vdara is about half the price of the Bellagio, but I digress.
The hotel is new and clean. The staff is extremely friendly and helpful. The room is clean and modern. I love the fact that they have a full sized refrigerator for booze and left overs. The bed is relatively comfortable, the windows are really dirty.
Overall, its really good for the price. If you are looking for a luxury hotel, stick with Bellagio or Wynn. I probably wouldn't stay again.