I'm not your typical Britney Spear's fan, but brought my girlfriend here for her birthday. We got the standing room only seats (which are right next to the stage). I must say, I was pretty entertained the whole time. It's a fairly crazy spectacle (which you'd hope to get in Vegas) and I definitely never found myself bored.
We were close enough that we could see Britney and her dancers really close up. The drinks were a bit overpriced (as to be expected) but sufficient. If you were a teenager (or probably even younger) in the late 90's early 2000's you'll have nostalgia for this kind of stuff and should be entertained. Even if you're not, it's pretty fun...