I have mixed feelings about this pickup. I use it on my D28, and it does give a lovely sound, with a real clarity to it. But it's quite a different sound to the unamplified tone of the guitar - much brighter, but in a pleasant way, not overpoweringly so.
But where I really struggle is with the physical sensitivity. It is designed to just not pick up the electromagnetic effect of the string motion, but also the physical movement of the soundboard, so as to capture Newton Faulkner-style body taps and the like. Personally I don't need this, and it means that I get some clicking sounds coming through the pickup while I'm strumming, as a result (I think) of my plectrum either hitting the edge of the pickup, or the edge of the soundhole.
So I've had to adjust my technique to strum further down the strings towards the bridge, which obviously leads to a slightly different sound as well as a slightly less natural playing position.
It's now workable, so I can enjoy the sound of the pickup without the clicks. But I'd rather have something that gave me that sound without requiring me to change my style.