Everything has already been said.

UTILIZATION

So the advantage of this pedal is that it is very comprehensive for a tight budget.
I often see at 60-100 € pedal with 3 knobs and nothing else, there was 1 High, 1low 2mediums, gain, and of course the volume.
for 25 €, not bad.
result, with little knowledge of basic equalization, px we have a result very nice

my seller that I was spinning in the window without a manual, but I do not need

SOUND QUALITY

I used it for a year between my amp and my guitar behringer behringer kit, before opting for a Boss ME-50 by changing the guitar and amp.
I returned quickly by placing emg on my guitar, the boss is not satisfactory.
this pedal, besides a proper equalizer (although imprecise, is not just have everything at this price), has a considerable advantage: no background noise. I used an ibanez rg between emg and equipped with a marshall MG100DFX volume to 3 / 4, no interference from the pedal cable despite crappy, without noise gate!
it allows me to do well without shouting shovel complicate my life. We could blame him a certain lack of warmth but hey, at this price ...

OVERALL OPINION

I used a year on the rotten stuff frankly, I was happy, I use stuff on the amateur / semi-pro, I am more than satisfied

problem, mine to a defect that prevents me from putting it on battery, but since I never go anywhere without my power strip and a set of transformer, it does not bother me. I plug in a transformer of desktop speakers 9.4V, the slight over-voltage him pti spinning a kick in the ass at high volume.

the plastic shell is a nothing "toy" and does not inspire confidence high at first glance, but after 3 years of heavy use and abuse, it is tjr there, so no worries on that side.

with experience, I would do without hesitation that choice, a distortion of the metal quality at this price, it's inconsistent. obviously, it did not heat a large, but it suits the poor as I am pti