We are always happy when we stay at the Bellagio and we just went back last month. The rooms are beautiful and well kept up, I could swear the one we were in was refreshed, but I am not positive.
If you have a room where you can see the fountains going off that is a huge plus, but those rooms are often booked. All of the rooms are great and the Bellagio is one of the nicest Resorts in Las Vegas. The service is great, and I was once not pleased with the speed of check in, but they have really worked on this and it is mush better.
The entire place is just stunning. I love the glass tile on the floor of the lobby and the flowers everywhere. You will have a great time.