First off all it's a well-built metal box.
Tested on a Tube Marshall DSL 1923 50 watts, on a transistor Marshall (from the 00's) 30 watt, on an amp modeler 75 watt, on the clean channel, reverb from the amp, and a delay pedal after Uzi.
Various guitars of friends and mine. On a super cheap LP type, s Ibanez mid range, s expensive from the 90's, squier from the late 80's, on a super expensive LP Standard,
(expensive and cheap) humbuckers and single coil pickups and I tell you this:
It's way better than I expected.
3 different people with a bit different taste, we all managed to take out of it great sound.
When we put a green box (original and clone) before... it sings. very (very) nice sustain, from a smooth mid range lead, to more trebly and aggressive sound, Good rythm too for metal and other styles, of course with a little tweak on the pedal and the amp. (I like the bias knob around 11 o'clock)
Tested with other pedals too, (I'll review some of them also) before uzi in the chain and it behaves very well.
Chain --- TO800 - UM300 - HB Crunch - JOYO Uzi - EQ - Tc Electronic Delay - amp clean channel.
Value for money? Definitely it's worth way more than it costs.
Rich sound.
You can't go wrong with this pedal.
One of the best deals you can get.
Nice touch the led on the side.
The only con I could say is that it doesn't take battery, but it's fine by me.
In the end, it's all a matter of taste. It sounds good to me and that's all that matters.