I was really excited about the M.2 breakout board. Unfortunately the board I wanted to plug into the breakout board had components on the back and that kept it from being able to plug into the M.2 connector. Not Elecrow's fault but something potential users of this product need to keep in mind. I wish in addition to the various key options that Elecrow would offer different height connectors on the breakout board or just offer a taller one.