Tool's live show is like one 2 and a half hour long trance.
It's excellent. Great sets. If you don't do drugs and yo udon't dig the band so much, you may not have AS good atime as some of the other fans, but its still worth every penny. What I mean is there are some slower more boring songs that they DRAW OUT and it seems like forever, but if your on drugs or your huge into the band you'll love it. When I saw them, I was a pretty big fan(bigger now) and I thought it was fucking amazing, except the aforementioned stuff. The pits aren't too brutal at all. While I wasn't in any, or even the floor, I could see it all perfectly, and it got moving during heavy spots like The Grudge(opener song, so more madness automatically entailed), and Aenema. But the their are LOTS of stoned people, kind of pathetic really. There were actually people sitting down in circles on the floor during the show. I say its a waste of floor seats I was too late(by like 3minutes) to get.
SO, in conclusion, they are perfect live, the more you like em, the more your going to like the WHOLE show. If you don't like em so much, you'll still love it, but it won't be as much a Godly experience as it would be for stoners and Tool freaks.