Of ergonomics like it well in hand and is provided with a coating that maintains it in place. The buttons are well placed, analog work well as the sears on the front (a little hard but it will relax the hours of use)
If you want to criticize a led activation of the vibration is a plus and the handle is a little small for my big hands but I think it is perfect to the greatest number.
The real downside is the length of wire a little ridiculous, right after you have to go on a wireless version if the distance is important ...
