Three times - twice on one trip and once in California
A rented
scooter broke down completely inside Buzz Lightyear. An area manager was called, and that person contacted (left a message at, since it was after hours) the rental company and called Stroller Rental and had somebody bring me a WDW
ECV. That CM escorted me to Guest Services, where I left their scooter and somebody drove me to the Polynesian where my dinner reservation was. After dinner, someone at the Front Desk loaned me a manual wheelchair and told me just to return it at Pop Century.
Next day, Walker brought a replacement ECV to Pop. The following night, as I was leaving Chefs de France about 10 PM, the ECV felt 'off'. One of the few Guests left in the park noticed I had a flat tire. I managed to get out of the park and to the bus area - slowly, carefully, and (as usual

) a bit off-balance. I called from my room the next morning, and they brought me yet
another replacement - this one with solid tires

.
Disneyland, my experience was not so great. Despite charging the ECV properly and fully every night, two or three days into my trip it was running low on power by early afternoon. A manager was called, and escorted me - in fits and spurts - to the front of the park, where I rented one and left mine to be charged. By the end of the day, and for the next few days, everything was fine. A couple of days before I left, I was on a tour and the same thing happened. The tour (well, the tour leader and the two of us taking it

) were supposed to be enjoying ITtbaB; since I'd just seen it in the last few days, I opted to skip it and not delay them, and head to the front of DCA to repeat the 'rent and recharge' procedure.
Well. The ECV died about halfway to the front of the park. NO power, period. I didn't know where the manual switch was, and I couldn't have pushed it anyway. I was using a single crutch at the time, so I ended up "paddling" my way - pushing off with the crutch. Not ONE Cast Member 'noticed' my predicament. Not one. I was too busy working my way through the park to really notice who I encountered, but I find it unlikely that no Disney employee saw me struggling.
By now, I knew the problem was how I was charging the ECV, it was the vehicle itself. I called the rental company, they replaced it for my last two days, and credited me for one of the Disney rentals. Never again
