Works only for a few months - design issue
After a few months of use this didn't trim very well. Everything seems to work, but it doesn't trim.On inspection, the blade unit isn't rising up to the top, it stays low in meta guard. Cleaning with alcohol didn't help.I think the blade unit is supposed to rise up as it spins, lifting off the base rotor. This allows it to trim, while reducing the risk of cutting tissue. My guess is that with time it may fail to lift off.I don't like replacing things every few months. It's wasteful, not to mention annoying.