It is a little hard for me to review a place like Pure because it is not really my scene but I have been to enough of the Vegas clubs to at least be able to compare a little. I like it better than Tao which is at the Venetian even though I like a the Venetian better as a hotel.
The outdoor patio overlooking the strip is a great feature of Pure and it is nice to get some fresh air. It can definitely get crowded and hard to move around which is not really my thing but that is what clubs are all about. It is also nice that the line to get in in case you have to wait is inside Caesers and not as much in the odd cattle call type fashion as Tao.
I think there are definitely more fun places to hang out in terms of bars and restaurants in Vegas but if you are into the club scene, I would say Pure is one of the better ones.