This is a really great bike. I've been over 100 miles on it so far - no issues at all. Easy to put together - 30-60mins. Pedal assist is superb - the cadence control is spot on. Out of the box max speed is 15mph - when fully unlocked - I managed to 22mph flat (which is fast for a bike, the 4" tyres really help control at this speed). Range so far is around 25-30 miles with heavy motor usage. Hill climbing is ok out of the box - you really have to unlock it for steep hills. I'm guessing around 15-20 miles if you used the throttle only. The bike is quite heavy - I wouldn't want to run out juice and self pedal it miles. My first E-Bike and I love it, recommend this to any body!!
We love our TESGO Hummer-Pro bikes! I like being able to take small brakes while going up a hill! We have an R.V. and travel and it's great to be able to leave the big vehicle at camp while we cycle around town for groceries. We plan to ride these bikes for a long time until retirement.