Cons: I came here for opening industry night with a group of guys. Luckily, we were hooked up with free bottle service, but the people working the door were very unorganized and it took way too long to get inside. The indoor dance area is kind of lame compared to XS and it is way smaller. Buuuuut...
Pros: The back of the club opens up to Encore Beach and it is beautiful! Our table was outside and near the blackjack tables (yes, blackjack tables inside the club!). I wouldn't come to Surrender if the outdoor area were not open, because the indoor area is just not that poppin. The pool area is amazing though - very cool and breezy in the summer, good music, large & definitely not overcrowded (without being lame/empty), and blackjack tables for you to gamble! Overall, I was impressed - especially since we were out on a Wednesday night.
I definitely recommend Surrender if you're in Vegas on a weekday when some of the major clubs aren't open (i.e. XS, Tao). But make sure the weather is nice!