I went to Aureole for some after dinner drinks last weekend. Being the Saturday night of a fight weekend, I was surprised at how easy it was for us to get a table at the bar. It was a nice oasis from the crowds flooding the rest of Mandalay Bay.
The wine tower they have is definitely worth a look. It's a pretty neat system where the wine stewards get in a harness and have to zip up the side of the tower to get the bottles high up. The tablet PC wine menu also gets them points for the fun factor for gadget geeks like me.
We had a very good Australian grenache, and a few of their desserts. Both the wine and food were excellent.
I will say that the wine was EXPENSIVE. There are not many bottles on their list that I would consider good deals (or even truly affordable for that matter) but the ambiance and service still merit this establishment five stars.