My Unknown Glitch pedal came a few weeks ago (took like 5 weeks). Seeing this thread made me realize I should try it. It took long enough to arrive that I forgot all about it.
All in all, it's okay/good. It's an oscillator with a Pitch control, an input option, Mix knob for blending, photo-electric sensor toggle, and volume.
On it's own, it's slightly boring (the most trebly settings have some glitchy movement which is cool) but it's more fun being fed into other pedals as a source or part of the signal chain. Then pedals downstream get more interesting and can be somewhat unpredictable. A drone loop fed into the input works pretty well, with (for example) a Stomping Stones Bit Crusher and Death Metal downstream, then playing with the Unknown Glitch's knobs and light sensor. Even with the Volume all the way down, downstream pedals react to it. There's a certain amount of latency, a one second lag between action and result sometimes. It seems like maybe the photo eye controls a voltage starve? I'm not sure.
Overall it's pretty cool, not anything revolutionary on its own but could be useful. For me, it's often a question of available space, and in order to get cool sounds from this unit, I need to supplement it with other stuff (like a Ditto loop input maybe, and glitchy fuzz downstream) which makes it a qualified success. It was priced right, about $77 and then $16 shipping.
This is the unit I have: Unknown Glitch circuit bent pocket noise synth:
https://www.etsy.com/listing/686611109/unknown-glitch-circuit-bent-pocket-noise?ref=shop_home_active_3I took a break and as I try the unit again, it's behaving differently. I don't know if it changes as it stays plugged in longer, or what. Certain settings I liked before don't seem to work the same. Now the unit pulses when it's not in Photo Eye mode, which it didn't do before. Maybe it's user error but it seems unpredictable now.
I like it, but I want a certain amount of predictability, and I'm not sure this one will make it into a live setting. But I also need to generate samples, so it's probably going to be useful sometimes.
I'll give it a solid B. It's for experimentalists. Sorry this review is a little scattered but I wrote it while I was testing it. These are just my impressions.