The tumbler arrived quickly and was packaged well. The tumbler is surprisingly large relative to most magnetic tumblers you would use for silversmithing applications. Instructions would have been nice but it's pretty obvious how it works (I am curious though if the little LEDs actually do or mean anything because I haven't seen them light up yet). I am giving 4/5 stars instead of 5/5 because the main controller knob is incredibly wobbly. I looked inside and it doesn't seem to be screwed in properly to the body of the machine. It works fine, regardless, but I hope it doesn't break prematurely because of this.