Update: Installed not just the DSP, but replaced the JBL component system with SSA Evil tweets and mids so I can't do a direct comparison.
Installation: very, very simple. Interior space is at a premium in Jeep Wranglers and this thing got stuck behind the dash using double sided automotive tape. The 2 input and 4 output RCAs are labeled by stickers (one fell off), I would have greatly appreciated color coded connections, but I was careful and didn't mix anything up.
Tuning: the app is very intuitive on my iPhone SE, it even includes a demo mode so I got to play around with the large, easy to use menus while the DSP was being shipped from Brazil. Most settings are easy to adjust by either directly typing in the desired values or by pressing an up or down icon. My fingers are large and my phone is small but I have no issues fine tuning.
Sound: No noise... that's a very good thing!
Functionality: 13 bands in the graphic eq section with htz values at 25, 63, 160, 400, 1K, 2.5K, 6.3K, and 16K. You can set different values for all 4 output channels. There is one user assigned parametric eq frequency. The crossovers are probably the best part with different typology and slopes from 6 to 48 db. Very easy to set and tinker with. In addition there is delay and phase controls as well as an audio generator and battery voltage tool.
Conclusions: I'm the ultimate neophyte with active crossovers and sound processors so everything is new and I lack the proper vocabulary, so in layman's terms...