For $10 (now $3) this is a good value. A couple of slight criticisms: First, it wasn't clear to me whether the clear "washers" are meant to insulate the Arduino from the screws or as stand-offs between the Arduino and the acrylic base. I assume they are meant to go between the screws and the Arduino. However, even then, I think some stand-off spacers are still needed because (second issue) even the slightest turn too much on a screw can crack the acrylic base against the barrel jack's pins. Othe...