Review on Gikfun Screw Shield Expansion Board: Enhance Arduino UNO R3 with the EK7007 Add-On by John Bennett

The first one I got didn't work. The connections within the actual shielding have been loosened. The only way to get it to work was to put a lot of pressure on the block, which is obviously unacceptable. Notified Revain of the problem and they immediately sent a replacement unit. The replacement device works perfectly. This makes it much easier to securely attach the wires to the Arduino board without having to poke them into small holes on the included breadboard. I've used it on many trails to help me and have been happy with the results so far.