Small problems
I bought this model because it's very light and therefore very comfortable to use with a cable.
Unfortunately for me, I took the wireless model.
As soon as I unplugged it, it stopped working. Of course, I left it charging for a long time. Then I charged it with a mains adapter, but nothing happened.
So I went back to the shop and changed it, without any problem....
Back home, same causes, same effects with the second one.
It's a shame, I really liked the way it handled.