Setup could not be simpler, 3 buttons: level, tone and gain.
Bought used, I do not have the manual, but it is very easy to adjust.
The system to open the case and replace the battery is not very convenient.
The case is plastic, but it does not have to jump on it with both feet ........
The first third of the race the gain knob with single coils, it acts like a treble booster, giving more presence and fishing microphones lacking a bit.
(Alnico 5 pickups Squier Telecaster custom of my 62 take a little color "Texas Special" as soon as one clicks.)
From the second third was a crunch blues look great (like Clapton on the album with John Mayall) on the other hand must not exceed half of the tone setting, otherwise the sound is too loud, same for the gain, because the sound quickly becomes sloppy and humming sounds.
I for one month.
I have not tried the pedals from other manufacturers, because I found it for a used bargain price and the sound is perfect for me, especially for the most consistent distos, I already a BOSS MD2, both pedals are perfectly complementary.
I love how it boosts the sound and crunch blues.
on the other hand, for the more saturated, with more sustain sounds, it does not replace a true overdrive because it is best not to turn up the gain too.
If you just stay in the blues record, it can advantageously replace the famous green pedal that is 6-8 times the price .....
I do it again this choice without hesitation.