Thanks for such speedy replies. To answer a few of the questions:
- The bike has 4 levels of assistance (ECO, TOUR, SPORT, TURBO) but I'm not noticing a great deal of difference between them.
- I try and stay in the lowest level of assitance and highest gear for as long as possible so as to feel the benefit when I really need it but it didn't work yesterday - I was climbing a steep-ish hill but not excessively so (I couldn't tell you what the incline was) and I was really struggling in TURBO mode and the lowest gear - it really was like riding a heavy, unpowered bike. My wife did it with the minimal effort mentioned.
- I'm about 5'10" and about 13 stone (maybe a little more!) and my wife is 5'6" and around 10 stone...