Installed on my paisley pink acoustasonic. These are absolutely essential on these guitars to prevent the ballend from falling into the electronics cavity if a string breaks. Installing was a very straightforward process, I didn't need to use the supplied bar as the acoustasonic has a brass grounding plate under the bridge already. One pin was tricky to place but this was due to my bridge hole being countersunk too deep on one side, I remidied this myself without much difficulty and it does not effect the pins performance. I personally have noticed more resonance and sustain from the guitar. I would recommend these for all acoustasonic or gigging guitars for ease of string changing but I don't think I would put them on my high end acoustics that I use for recording. I'm personally ordering another two sets for my other gigging acoustics.