The wiring inside is a bad design
on the top of the unit, there is a plug for the cord (not cordless).  This turns to keep from twisting the cord, however, the ground and power wires are on the other side of this and every time the cords twists, it twists those wires off on the inside.  This happened on the first time I used it and now I need to solder those wires back on.  Bad design.
Rating: 1 stars