This jack is of good quality, with two notable exceptions. The black paint job is pretty fragile and your plug will leave small scratch marks over time, showing bare metal (only visible from up close). Also, the soldering tabs are a little too quick to bend and feel like they wouldn't take much force to break off. Neutrik plugs are a very tight fit.
Great quality jack. Suited for classical and acoustic guitars. It has stereo output (mandatory when using a built in preamp/tuner) as well as a metal cap to provide shielding. This jack is also a strap pin. You need to make sure the guitar has a solid piece of wood where you want to apply it (usualy, classical and acoustic guitars have a solid piece of wood at the bottom).