This topic comes up a *lot* around here! LOL
I'm with my buddy
@Selket on this - I'm a 3-wheeler all the way.
As I said recently here (in another post)... 3-wheels aren't necessarily more unstable than 4 - I have been driving a 3-wheel device daily for years with zero problems, and I am a 3L (large, lovely lady).
Personally, as someone who uses a device full time, I require the maximum maneuverability possible - otherwise I'm spending an inordinate amount of time every time doing 3-point turns, instead of spinning a 180 on my back wheel, and going on.
Often I see people who feel like 3 wheels are less stable because they believe it is more "tippy". If you are driving *any* mobility device too fast, or taking a curve too quickly, or going down (or up) an incline too fast... regardless of *how* many wheels it has, it is risky.
There are hills, ramps and inclines at WDW that are *steep*. We need to go up & down them slowly, and carefully - regardless of the type of device and/or the number of wheels present. Just because we *can* drive up/down those inclines doesn't mean we shouldn't take care and proceed with caution.
Keep 2 hands on the "wheel" (don't drink that Starbucks while you are trying to drive!) and half (or more) of the battle is won