Review on Master Guitar Chords Anywhere With The Portable Pocket Practice Tool - Includes Rotatable Chords Chart Screen And Battery! by Cody Henry

This is a handy little gadget but, at the tighter resolutions, the quality control shows issues. For example, on the .010" string height gauge your machining and printing have to be spot-on perfect. Mine cuts almost all of it off, meaning their process is nearly .010" out of true. I can work around it by treating .020" as .010" and adjusting all the other measurements accordingly but, for a tool that's intended for these tight tolerances, their manufacturing is rather sloppy. Three stars instead of two because, with such workarounds, the device is usable if not convenient.