They're fab - quick and easy. But take some getting used to.
I realised that shaving the treasure trail looks odd, and that going too short just looks strange - plus you have to grade into the leg hair.
(I shaved my legs when I was in my 20s and racing mountain bikes, but no more - at 6'6" there's too much acreage to cover)
But this time - I left off the #2 comb I usually use, and ground a bare blade into my nuts. Causing minor, but painful damage.
Pay careful attention when using electrical/mechanical devices on your bits.