Absinthe is the best show I've been to in Vegas - fun location under a circus tent, awesome vibe inside, a great view from everywhere. The MC will have you laughing your ass off, and the acts are sexy, awe-inspiring, and incredible...I sort of want to go learn trapeze now.. :-P
If you're sensitive to partial/ basically full nudity, strong language, and raunchy comedy...this show might not be for you. If you do go, I recommend Tix 4 Tonight, which usually has them for around $75-$80.
There really is something for everyone at this show - I recommend it for literally anyone visiting Vegas. Grab a couple drinks before you head in, and have an amazing time!