This is by far the best go-kart track in Vegas. Gas powered karts - not electric ones like the other tracks - give you that real racing feel. They are MUCH faster than the track, so you really have to drive. You can't just floor it all the way around the course like at the kiddie cart tracks - this place is for adults who want to act like kids for a while, not snot-nosed toddlers.
Staff is always helpful and friendly, track is perfect for all skill levels (not too easy or too difficult) and it's a great bang for your buck. Just about anytime I have friends or family visiting me in Vegas and they ask to do something non-traditional (i.e. not gamble, get trashed, hit the strip clubs or spend hours throwing food down our throats at a buffet) I take them to Fast-Lap. Not once has anyone I've taken not been thoroughly impressed and had a great time. It's a blast - try it!