The teeth are sharp, but can be fixed
All the brushes have flashing that are sharp and does not feel nice on the scalp, see pictures.  Used my stoves gas flame to melt the flashing and smooth the teeth.  Just a medium fast pass over the flame and the flashing is melted smooth.  I melted a couple of the brush teeth until figuring out how fast to pass them over the flame.  Now they are smooth.  Also tried the green Scotch Brite pads, but not quite a smooth.
Rating: 3 stars