Meh. I've definitely seen better. This place is basically just a giant square and the music kind of sucks. Apparently there are three dance floors? I didn't know that. We actually tried to look for the other floors (because apparently they have different genres of music) but couldn't find any.
We got wristbands for free drinks and thought it was for Jet (that's how they were advertised) but they were actually for the club across from us, and of course we'd have to pay to get in.
We stayed in there a total of maybe half an hour. We ordered a drink (expensive of course, and not very good) and realized that it was just pretty annoying and we left. I've been to a lot of other clubs in Vegas (XS, Tao, Tryst, Pure, etc) and had a great time but I just wasn't digging the vibe at Jet.
When we were sitting around outside afterwards, we saw a group of people dancing randomly in the front of the Mirage hotel and noted that it was more fun than the club itself.
I don't think I'll be going back to Jet. There are a lot of better clubs in Vegas.