I use the bte the past year or so.
Pretty simple installation, with a small stack saccoche for the indoor. The microphone is fixed in the rosette with two screws that are pressuring the dernire. The jack will replace fixing your straps at the bottom of the guitar. (Very nice as Systm).
The main advantage of this microphone is the rglage "string rope", thanks to screw rglages below each.
The sound is of good quality clear and bright. (APRS adpend as your guitar of course). It's simple, plug and ring. In my case, I did not need to touch the equalizer of the table to have a good sound ... In addition, no breath, walk to save itself.
If I had to mount a microphone on another guitar, I would resume the same.