Ezee Forza
I irregularly ride 38 miles, 19 each way to and from work, charging at each end. On a setting of 4-5 assist I have no problem making the distance and increase the setting to 8 (maximum) for the last two or three miles. I finish on red but with some charge left. My jouney takes under one hour in the morning "down hill", when I am fresh, and about ten minutes longer in the evening.
I have cycled off road on the undulations of Whipps Cross (the southern end of Epping Forest and have never stalled. I always use full power for enjoyment and although some of the slopes are very steep they are also very short.