I live in one of the biggest boroughs of London and I've never seen another e-bike ridden, just one Lafree locked up once.
It seems they are rare in most places.
The Kalkhoff e-bikes are very new, only introduced a few months ago, so are not very common yet, but they are selling very well. As well as your's in Italy, one has reached Denmark and a few have even been sold from England into the USA.
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I buyed it because it was in a offer....i got it at really good price. Before it i tried 3 or 4 bikes (bixy city, italwin alloy, wayel one city.....and at the end kalkhoff) Wayel one city was very interesting me bacause it has a cardanic trasmission and it is really beatiful. But at the same price i got an kalkhoff ......panasonic engine, battery n controller may be are the best joice at the moment in the market...so i think.....