I now understand why XS is one of the best clubs in Las Vegas right now. The decor is beautiful, the staff is classy and the DJ spins great music. Usually you only get one or two out of the three.
We went on Sunday night, which is industry night. We waited no longer than 5 minutes to get into the club. It was crowded, but not to the point where it was annoying. There was a diverse group of people, many who were there to just dance and have a good time.
We sat at a table outside for awhile. Even though it was cold, the heaters kept us warm. Some of our friends decided they wanted to dance and a couple other tables of people got up and danced with us as well. 0verall, it was a good night.
I would come again on industry night...skip all of the tourists/annoying drunk people who come out on Friday and Saturday nights and wait in ridiculously long lines. If you're going to come to this club on either of those nights...make sure to get bottle service. It's the only way you're going to survive the masses of people.