I got a chance to test ride their top 300watt model in Portland OR last weekend.
Too upright for me, which means it's hard to pedal it hard.
PAS is activated when just resting the pedal in the 'ready' position, waiting to go at a light. I can't see a great way around that though.
Not enough power 0-10mph to get across an intersection. The power was definitely just an assist.
Front suspension barely did anything. Great for standing to pedal but why bother with a suspension fork then?
Price $3,500 after discount. Seriously?
My ebike is just a 700watt limited geared Mac hub motor, so nothing powerful. My currie motor crank drive 450w rated (800peak) performed a LOT better than the Kalkhoff and cost about $600 with battery. I think the Kalkhoff peaks at 300w. It wouldn't be a bad bike if it only weighed 30lbs and priced at 1/3rd of it's cost. The best thing about it was that it continued to assist above 20mph, likely to 26mph the guy said.
I did see one women riding a Kalkhoff in a bike dense neighborhood though.