Vintage Overdrive : Pretty good. Maybe not for bass guitar.

I bought this to a achieve a dirty bass sound akin to early Stranglers bass sound. I find that I need to dial the fx level right down to (nearly) get this sort of sound. On this basis I wouldn't recommend the pedal for bass guitars (unless you are playing metal).

Playing a guitar through the unit is quite satisfying, it produces a dirty yet warm sounding distortion. So I would recommend it for guitarists.

The build quality of the until seems good. Solid metal housing with a positive bypass switch. Great colour combination to give it that Bad Monkey look.

For £25 I'm happy with my purchase, even if it doesn't produce the exact tone I was looking for - this is not a reflection on the quality of the unit, purely personal taste.