the zephyr-cdn is a light and fast 20 inch folder with front and rear suspension, crank drive and hidden battery:
http://wooshbikes.co.uk/?zephyr-cdn
http://wooshbikes.co.uk/?zephyr-cdn
With Torque control every thing the bike does is in response to your legs. So yes you can set it to give no assistance and pedal like an unpowered bike or you can assist your leg input as much as you want. Its just as if, at the flick of a switch you are stronger than you ever thought possible! One big difference is that you can accelerate much better than before, so joining moving traffic is much safer. I sometimes find I am cycling with no assistance, except just flicking it on for 10 or 20 seconds when I restart. Just this tiny bit of power from the battery improves safety ( in my view) and reduces tiredness and journey times.. I am aware that I really want to be in control when in traffic so perhaps using the bike on 'neutral' in town might suit me whilst still having the boost for open path riding or hills. Is that possible?
The Krieger is introduced last October I think, it sold out last month, woosh expect a new batch arriving in a couple of weeks but my source says that the whole batch arriving in May is already all reserved, another batch will arrive in June....
For a non folding choice the Woosh Kreiger looks good but no sign of it being on sale yet.