I think Scooterbug also is who actually provides the WDW rentals. I know I've used a Scooterbug scooter at the San Francisco Zoo. (It wasn't obvious until you got to the paperwork that it was Scooterbug). My experience was that the scooter
was fine for a day at an uncrowded zoo. Personally, I didn't find it as maneuverable as the smaller scooters you can get from some of the other off-site rental companies near WDW. I also don't think their scooters break down for transport in regular vehicles, which some of the scooters from other companies can do. I think those are probably the main reasons you don't get many reviews here of them.