We bought tickets here on more than one occasion and we will go back on our next trip. The only draw back is the long lines you have to wait in, but once you buy a ticket you can show your ticket stubs with the map they give you and the next day you get in the VIP line with no wait. There are quite a few ticket places all along the strip, but there usually is a line. I would suggest going earlier in the day before they sell out of some of the show tickets. It is well worth the wait with the saving they offer you, there is no reason to pay full price when you have these places.
The employees are very knowledgeable and can help you with any questions you have. A lot of the time they had watched the shows we were interested in and could tell us from their experience how it was.