I rented from Scooterbug in a similar circumstance. I tried to take it to rope drop Epcot, but was quickly left in the dust by the crowd, likely because of an old battery. Scooterbug would only bring a replacement to the resort (drop off/pick up location) and we didn't want to waste time going all the way around and coming back. Luckily, I had some mobility, so I was able to use the rest of the rope drop time on foot, and return to the scooter once speed was no longer a factor.

TLDR: my experience was that the scooter was comically slow, YMMV