Came here for a convention. Mandalay Bay is massive ... so much that it takes a while to get from my room to the convention center. They have quite a selection of restaurants to choose from. Starbucks is always overly packed.
Loved that wi-fi was free and we had as many access ports as we need (I run a Mac with a VM which have separate IP addresses).
I stayed in a suite with a great view and 2 bedrooms/bathrooms so that my friend and I didn't have to share. First night here I swear a tornado blew threw town because the wind noise was so incredibly loud on the 26th floor and the windows and floor were actually shaking. Woke up in the middle of the night and it was gone.
Shopping here is ok. Best store is Metropark, but that's a chain and I can shop that at home.
Overall, an enjoyable stay!!