This hotel is so beautiful! When you walk in there is a long ceiling full of hand blown glass sculptures and underneath theres a beautiful statue of a horse, it's better to see than to describe!
I personally haven't stayed at the Bellagio but I went to see Cirque du Soleil [O] while I was in Vegas so as I was walking around I saw a mixed crowd, so for the most part it's an attractive hotel. Everything is mega clean and it's casino seems to always be packed.
I would definitely consider this place next time I come since I did see a bit more young people than middle aged and up [on the weekend] which makes me think it's becoming more and more modern and appealing to me.