I follow the instructions and don't do standing starts. There's another thread with comments from Mark at Cytronex regarding this. I usually pull away using a fairly low gear. This gets me to about 5 MPH (it's doesn't need to be exactly 5MPH and I dont check the speed on the computer) very quickly - several revolutions of the pedals or so. I then press the boost button which quite quickly gets me up to about about 11 MPH. At about 11 MPH I sometimes press the additional boost button which gives me extra power - It depends if I feel I need it or I'm overtaking parked cars. I don't really think about it much. Acceleration at junctions is a big improvement over normal cycling and personally I find it gives me more confidence. I have cycled up some long steep hills and the speed will vary depending on the hill and how much effort I put in and whether I use the the extra boost button (I usually do). Generally I think I get between about 11.5 and 16.5 MPH on the steeper hills I've cycled - the length of the hill not being an issue. That's sitting down and not exerting myself (defined by me not getting out of breath or breaking into a sweat). I'm in my early 50's and havent cycled much for years. Top speed so far down steepest hill 34 MPH and less steep 28.4 MPH - but that's really going for it! Usualy I just take it easy averaging about 12MPH regardless of hills or headwinds.I used full power quite a lot when I first had the bike but find I usually only use it uphill now. Locally about 1.5 mles radius the area is quite flat and I don't bother with the power at all. On local visits to the shops etc I leave the battery and the computer at home and find it's just like a normal bike which it is. The front hub is small and light and handling the bike up curbs and through doors etc is very easy even with the battery on. As Flecc says it's best to try before you by. A trip to Winchester is well worth the effort and there's no shortage of hills to try it on. Hope this helps