Just finished unpacking and now has a full charge.  Speed control seems fine.  

My suggestion for product improvement is to provide non slip ridges or  perhaps silicone overlay on conical blade handle so it is easier to grip and lock blade in place.  The current plastic is somewhat slick in my opinion and this is with clean dry hands.  I don't want to think about removing or attaching blade with wet fingers.

I hope this suggestion will be incorporated in the future.