I play a Charis Acoustic. This is such a beautiful sounding guitar but the on board pickup simply never did it justice. The amplified sound is nowhere near the natural sound and I was always very unhappy amplifying it.
Now, it's no big secret that the best sound for any acoustic is with a mic but there is always the proximity issue. You need to stay perfectly still which is pretty much impossible.
DPA solved that issue and then some.
I read a lot about the 4099G and listened to tons of sound clips so I figured I'd try it. WELL IT IS SIMPLY AMAZING! After about 20 minutes finding the best spot to point the mic I found real ear candy. My guitar now sounds exactly as it does unamplified, through my AER amp and the sound system at my church. I had two top notch musicians A/B my guitar using it and natural. NO DIFFERENCE.
If you're looking for real quality and pure sound this is a great mic and well worth the price.