Excellent solution for those who want to manage the MIDI on his favorite guitar. We can adapt the system to its expectations and its budget, Midi, Acoustic, switch knobs, selection etc ... in my case, I opted for a more water added "mag to 7 pin harness" , sending the magnetic signal "classic" of the guitar to the Pin 13-pin, very convenient.
Installation is done by a luthier for a perfect result, except that it is handy and ready for drilling, sanding his favorite guitar
The system takes up space (son of numerous enough, webs, electronic circuits, making 13 pin) so you must check that all houses, and resume drilling or cavity which houses the electronics.
The result works well, no problem.
I would definitely do it again this choice, since the only competitor would be a Roland GK3 sensor, not suitable for guitars with floating tremolo.