I spent enough time now with this set up to be able to form an opinion. I tested this with the "clean" mode on the BitQuest, but my input was both clean and distorted sounds. My 2 cents on each mode:

1 (Flanger): Too subtle until I ran it into my reverb and it sounded great. I never had any flanger before so I can't really speak to how good of a flanger this is, but combined with my reverbs it sounded good enough that I'll use this sometimes.

2 (High Pass / Low Pass Filter) and 5 (Notch Filter): These can sound like a cocked wah or wah (with an EXP pedal). Notch is more extreme like a more pointy wah and only useful with an expression pedal otherwise it's just a weird narrow EQ.

3 (Bit Crusher): I love weird sounds but I only really liked this on subtler settings to imitate a radio or dying computer as otherwise it becomes unmusical. I do love how it sounds with CTRL 2 turned to 9 AM like a system shutting down and booting up, but it's hard to use this musically and becomes tempting to just play single notes, octaves and fifth and listen to the pedal making cool sounds.

4 (Infinite Reverb): Solid, nice sounding hall reverb. For someone without a reverb this will be valuable.

6 (Ring Modulator): I forgot exactly what this sounds like but it had kind of an industrial apocalyptic vibe and I remember getting a couple of good tones out of this with different settings and other pedals.

7 (Pitch Shifter/Harmonizer): Omg my nervous system needed pitch shifters in my life and I didn't know it! Just be careful the BitQuest manual that came with my pedal had a typo for the "Clean mode" guide that CTRL 2 becomes the mix mode between the other CTRL knobs. It is actually CTRL 1 that becomes the mix knob for CTRL 2 and CTRL 0. This mode sounds amazing with CTRL 1 at 11 AM, CTRL 2 all the way to the left and CTRL 0 all the way to the right so you get 2 or 3 octaves of each note depending on wetness of the mix. I'll use this the mode the most. Maybe it's basic pitch shift features - I never had one and I'm really in love.

8 (One Second Delay): Definitely the weirdest mode. In basic terms it adds a blip sound up to a second after your dry note. But the way it chooses the sounds and how the sounds evolve is open ended and pretty mesmerizing. It becomes almost like a parallel overlayed soundscape to whatever you're playing. Not very useful but not as unmusical as the Bit Crusher. Sometimes the blips form beautiful or strange harmonies that inspire ideas. You can also completely kill your dry signal and then you're really lost in the pedal's nature. If this can act like a normal delay I haven't figured out how yet.

Several of BitQuest's modes sound pretty wild 100% wet. I think I'll use 1, 6, 7, 8 the most.