I had mine rotated, not sure about balancing, not all of them balanced them anyway though. My struts they completely missed the oil all over them until I pointed it out. So they are still like that. I've had issues when the boot just beeps and won't open which for ages I thought was me but I think is it thinking there is an obstruction. They just whirl and then beep. Yesterday it got half way up then slowed and then went all the way up again.