Absolutely awesome. As a first timer, I loved it. I probably wouldn't go back again just because I've already been there, but just like Times Square, if you're in Vegas, you should definitely check this place out. Highlights are as follows
*zipline
*music/light show on the ceiling
*more gambling
*street performers
*the weird feeling that you might get jacked at any second
* the 30 second terror you feel when you think you've lost your group and realize you don't have your cell phone and have no idea how to get back to the Strip
That last one is interchangeable