I used to own one, it really butchers the buds and your forced to dry them in a rack and then one side of the bud is flat because it was dried on its side. It worked good first couple hours then the blade really started to dull and it really butchered them. I had a trash bag full of trim where as when we hand trim I can barely fill a 5 gallon bucket with trim. IMO there all shit.
Unless you have fields of buds to do or its just crappy shwag buds Id avoid these things as said they do mangle the buds and they break and knock off a ton of the trichomes making the bud less potent.