Yes I do commute fairly regularly (I work freelance), with a round trip of 24 miles. I charge the battery after each leg of this though. My route, as you'd expect, is mainly on flat quiet country lanes, with only a couple of inclines to contend with.
I've done nearly 5000 miles since Feb. '09.
I've changed: The saddle, the brakes, the handlebars, the chain-ring (from 48t to 53t), the handlebar grips, and the original dynamo powered front light to a much nicer unit. I've also added brake boosters front and rear. Oh, and I've also had several broken spokes in the rear wheel, which were replaced FOC by Wisper.
I do my own servicing, not as a regular overhaul, but on an ad-hoc basis, as things start to feel loose etc. One thing I'm surprised about is that I'm still using the original chain and gear set, which to date has shown no sign of wear (chain not skipping etc.) - touch wood.
The motor/battery are still pulling as strong as ever, and other than those caused by my own stupidity, I've had no electrical issues (nearly melted the multicore to the controller, after a botched fix on the pedelec power switch following a crash - doh!).
My only gripe, which has been addressed in more recent models, is the lack of a sealed bottom bracket, but hey, I don't have to re-grease/tighten it very often (once or twice a year), so not such a big deal.
