As cheap as it looks.
I wasn't expecting anything major out of this, but still this was pretty sad.  The labels on the little power supply where half stuck on with bubbles and wrinkles in them.  It comes with a nice big bag of the small diameter sanding disks and not much else.  There's a mandrel for the disks and a few metal abrasive tips.  I didn't expect major power out of the motor and it wouldn't work if it did since the bits just push in to the housing and are held by friction.  Who knows how long that will last.  However, the power supply was the big disappointment, since it's just a variable DC output supply (basically a potentiometer varying the output voltage).  What that means is that the motor stalls at about the halfway point with no load.  There's really not a lot of value in the range of variability.  What I'd EXPECTED/hoped for was a digital PWM output that would keep the motor running at full torque even at low speeds so that you could turn the speed down to reduce heat and improve control but still be effective.  Instead you only have fast or faster.  No slow.
Rating: 3 stars