I took R2 to the Comic/Horrorfest today. I was pleasantly surprised at the battery life for the motors. I got about 3 hours worth of drive time, with pretty heavy use. I did some speed trials out in the open parking lot and he was haulin'. Something happened with the bluetooth connection on the mini though, so I couldn't get the sounds working (should have brought an LCD monitor), but other than that everything went great. People love him, especially kids.