I can't wait to come back to XS!!! I don't really remember the "indoor" part of the club - some how we made it outside near the pool and just danced in the wading pool area. I was with a bunch of girls and we had a hook up so we didn't wait in line, nor did we have to pay (yes, we're spoiled...that's how we roll in Vegas!). I agree w/ that it's like Tryst on Steroids! I was so drunk that for a long time, I thought I was a Tryst the whole time...until I looked up and saw the big ass XS sign. Music was decent too, from what I can remember.
I'll edit this post when I go back to XS when I'm not so drunk - that way it will be a little more accurate!