Bests & Worsts Reviews from Amazon

I wanted to like it, but after a few uses the top part covering the razor keeps popping off while the motor/razor is still running (just saw that another reviewer says the same)! Very dangerous, both since the cap that flies off hits near the eye, and also because an open, rotating blade could injure. This is a major design flaw and/or quality control issue. The pen also seems to have an endless supply of black grease emerging from somewhere in the motor that deposits itself on the surface that you’re trying to razor. Why?? Good idea but very poor execution and quality control