It's certainly is a fun little kart to drive. The only issue is that there is no reverse gear, so if you get pushed up against the wall. You will have to reset to the pits. The more powerful EVO version has reverse but I found the regular version was more fun.
I can almost guarantee carnage.. lol.
As for race length, do you mean instead of 2 x 15 mins races, we would do 3 x 10 min races?