This is a Fulltone OCD copy, sounds the same, but a tiny bit muddier, controls are a bit tricky, with tone and the FAT switch, but gets a heavy drive tone on it's tone, and great for the price. Recommended with a good amp that can take bassy, fat pedals without getting muddy.
Personally I think this sounds just like an OCD Overdrive. I have tried them side by side and there is BARELY any difference. It is very versatile and responsive and I HIGHLY recommend it because of the price. It is still one of my main go-to pedals and it always will be.
This pedal is good to start out with if you want to start messing around with distortion. You get what you pay for with this pedal. It works well with my bass but it definitely plays hell with my bass head. The sound can be a bit muddy at times but if you work with the settings it can be set up perfectly.