Everything has already been said ...

22w sending rather well ...
Size small!

UTILIZATION

Ultra simple.
is an amp (not a preamp).

You arm your guitar in, and you RESORS to a baffle (8 or 16ohm)

The sound is right.
So it all depends on the guitar and the speaker ...

SOUNDS

I'm using a Start or an old TV cabinet in baja Hiwatt 4x12 (HP Fane) and another Hiwatt 2x12 (Celestion)

I have a Zvex "Box of Rock" and a mic amp to the crunch and distortion sounds, boost, etc. ... and I like it though!
If they have a dial tone, it has a bright switch, or normal. Enough to use that I have ...

OVERALL OPINION

Well, I usually play on Hiwatt Custom 100. His pop-rock and English.
It's heavy, bulky and often is 15W AC is enough for me (repeated, short concert).

I got this pedal because it is what is most convenient question and space power, and secondly because I have a sound that is quite right in general. So it suited quite precisely.
I make no secret that a tone would have been a real rain (hence the 9 / 10)

EVEN IF it sounds not like my Hiwatt ...

It costs a hundred euros, it's tiny, well, I say YES.
(I wanted a Tiny Terror, and then it was too big ... and good, this little EHX defended well in its way)

A word to the wise.