I have installed it on Yamaha LS16. Installation was easy (enlarged the hole - diameter 12mm is perfect, connect the pickup, fix the pickup with the screws). I would like to point out, that the fixing screws are a bit weak. This is the only design failure I have found (the reason I decreased the score on quality)
I'm using it with the Fishman Loudbox Artist amplifier. Sound from my opinion is great (warm, mellow, reach) and suits my guitar very well. Volume is even between the strings. Output volume is high. Volume can be adjusted on pickup what I found very practical. Gold version also visually looks great on natural colored guitar.
I'm very satisfied with the pickup, especially considering the price. I would buy it again.