I dont have too many killer hills around here but even with the ones that are here, i can get up to 30mph within reasonable time and top out at about 38-42mph going up the hills here. I suspect with my upgrades coming in soon in the mail, i'll be able to get a bit more power on those hills.
However, not having to tinker with you scoot is a beauty in its own right. Glad you're liking your super 8, i may pick one up used if i ever come across one on craigslist.