I don't want to write bad stuff about this product, I love the brand and it's a good product.
But.
You plug in an Atmosfeel pickup (Yamaha FGX 5) and the resulting sound without any knob touched and with no effect on will sound like there's a phaser pedal on at minimum, and in general the tone will lose realism, by a lot, the guitar sounds worse than a cheap one.
I have other, simpler guitars with standard piezo pickups that I don't use much anymore (Seagull, Lag, Cort), and this AD 10 does a good job improving their sound, but with my FGX-5 it's much better not to use it at all.