In the past 2 weeks I modded 2 basses: Aguilar jazz pickups with J-Retro Dimarzio jazz pickups the Audere Deluxe and 6 knob switch. Out of the box, the J-Retro was very usable. I took it to practice, it sat nicely in the mix, the color that I get in active mode sits well in a mix, and it was a joy to use. Fairly intuitive with the stacked volume/blend treble/bass mid/sweep controls. The Audere replaced an Aguilar OBP-1. I took it to a mock show and it did not cut through the mix regardless of what I tried. Completely my fault, the manual says it is tuned for a Fender Jazz bass. With the 6 way rotary dial you get 17 configuration choices, and it is really easy to program. I chose 6, with position 1 being "bypass"', position 4 being vintage, position 6 as modern, and 3 other tones that just sound good with the bass. I like the J-Retro a little better because I don't tweak it as much. It's always kind of right and really easy to boost and sweep the mids to fit in the mix in the sweet spot. Between the Z-mode, low mid, high mid, treble, bass... It can be a little over whelming and with so many choices I tend to over think it sometimes and tweek instead of play. Both are really solid! If I had to do it again, I would probably make e same choice and go with the J-Retro on the 4 string and Audere on the 5 string. Primarily because of the way the Zmodes impact the tone of the B string.