I bought an Integrale S11 and I love it. I'm 60+ years old and commute 20 miles a day in fairly flat northern Illinois. I bought it because I wanted to stay active, but, my commute times were getting slower and slower (kind of discouraging). The power is just a blast, and everyone who rides it goes "Wow!!".
I carry a lot of stuff with me, and this is a big bike with a lot of capacity. I've never been a spinner, but this thing encourages you to ride fast. I ride around 18 mph, whereas my old pace was around 10 (down from 13). I can ride pretty easily, in any wind, at 18-22 mph. This thing just sort-of cancels mother nature.
That all said, I ride in any weather conditions. Rain, shine... doesn't matter to me. I ride on reclaimed (gravel) railroad right-of-way for probably 15 miles of my commute. The balance is mild residential roads.
I have had failures that I think are due to water intrusion into the motor, which sits right behind the front wheel, in front of the cranks. Two days after riding in absolute pouring rain, the power assist quit. Power recovered after it dried out, with an occasional intermittent failure here and there. Yes, the dealer and I are disappointed; figuring this should handle anything anywhere. (I've done tours where it rained everyday. I've also biked the Swiss Alps in thunderstorms, so wet conditions are to be expected.)
This is still and open issue. Germany has dispatched a new motor to the dealer. It will be swapped at no charge. I'm expecting the engineers will figure it out.
For my part, I installed a real nice, fat leather splash guard on the front fender, and this prevents direct splashing on the motor.
I still ride this daily and have no regrets.