My Wife and I have seen this show a handful of times and never left disappointed. Great entertainment. The show does rotate it's impersonators so you never know just who you will see. There is some adult humor/language but nothing too outrageous. Just keep that in mind if you are easily offended.
It's one of the only shows where picture taking is encouraged! They do have souvenirs you can get and they donate proceeds to the Make A Wish Foundation!
It is the longest running headliner show in Vegas for a reason! Definitely a must see!