At the price you would normally be forgiving towards minor issues but there are no such issues. Both sound and operation is great. You have to get used to the fact that both "Voice" and "Drive" affects the level of overdrive, but this actually adds a tone flexibility not seen in many other pedals.
Got exactly what I was expecting. Don't really see any cons with this pedal, it sound good, the voice control is great, You can even get some fuzz-like tones if you play around with the knobs. Very responsive, actually works pretty fine as an amp simulator - don't have an amp at home? Just plug this thing into your speakers and jam away, it really sounds pretty decent (not like a real amp, mind You, but close enough for fooling around. Anyhow, it isn't quite it's purpose, so complaining would be silly). It gives of a certain mars******esque sound, I find it sounds best with a strat, definitely some Hendrix there. Only "negative" thing that I can think of is that it doesn't have a lot of gain, but then again, I didn't need a high gain pedal in the first place, so I'm happy with what I got, but for those who are looking around for a distortion pedal - maybe go for true tone california, or that extreme metal one, because this one is pretty tame and soft, I guess You could call it "bluesy". Quite dynamic, works well with volume swells. Would recommend.
UPDATE: I played around with the pedal using different amps, and it is great! The voice control has a lot of scope, and with the right amp it has quite the range. The amount of available gain depends on the position of the voice knob: all the way to the left - Hendrix'ian sound, almost a fuzz, sort of like a fully cranked old-school stack, dirty and fat; at the middle it sounds like a standard 70's rock setup, especially with a Les Paul, a tad to the left - definite Jimmy Page territory; all the way to the right has more gain, and is a smoother, more "concentrated" sound, similar to a more modern mar***** sound - mixed with the right amp and a LP I easily get Metallica tones.
At first when I got this, I was slightly disappointed, but now after I've spent more time exploring the sounds that it provides - it's great! Later on I'll upload a review of this and the Harley Benton ST-62 MN SB, so stay in tune.