Well, all things considered and although it is a bit pricy and a bit over long.."O". You will never see nor have you ever seen anything like it.
Depending on your tastes...
Old fashion (topless review, but great show) Vegas Show..Juibalee.
One man show...Danny Ganns...singing impressionist.Entertainer of the year so many times it's hard to keep track)
Bit younger, but fun...Blueman...don't sit in the first 5 rolls...you'll get "blue gunk" on you.
Uptown...Phantom of the Opera
Elvis...that guy Trent "something" down at the Sahara...GREAT SHOW. Can't recommend this enough for Elvis fans.
Magic....David Copperfield...simply increadable.(don't let your girl catch the pickle...it means he wants a date with her)
Nostalgic...An Evening with Frank, Sammy and Dean...lots of fun, esp. if you remember the 60's, early 70's.
After that all the Circ's are great(most big Circ lovers still like Mysteir(sp) better), and lots of people like the major singing acts around town like Celon. Pick your favorite and they might be in town, from Rock Bands to Folk music.
Even just the lounge acts or the bar bands can be as good as anything you can see anywhere.
And if you like to be grossed out and laugh your butt off. "The Amazing Jonathon"...magic without magic. Penn and Teller can be fun.
Frankly, I'm not sure I have ever been to a BAD show in Vegas.
For FREE..the guy downtown in front of the Gold Nugget on the Sax...fantastic!!!
I don't think you can really go wrong...just go with the type of entertainment you usually like, but everybody in the world should see "O" once before you die.