So I just bought a couple pedals from this Chinese company called Joyo, one called the Ultimate drive and the other a tremolo pedal. I had been seeing them on eBay for a while so I figured I'd give them a try.
The ultimate drive is supposedly a clone of the fulltone OCD, which I've never actually played. But I must say this pedal sounds pretty darn good and the construction is surprisingly solid. It has a fairly transparent tone, although it gets a little too bassy when the drive is kicked up past noon. The sound is nothing like your traditional tube screamer type pedal, which I never really cared for. It's smooth sounding and doesn't have that midrange honk. It also doesn't have a fizzy sounding high end like many OD pedals I've played, excellent! It can go from a mild slightly overdriven amp sound to an almost metal tone. Cleans up nicely when volume on guitar is rolled back as well. One note worth mentioning is that it is very sensitive to where it is in the pedal chain, the tone and volume will change drastically, it sounds best when it's at the beginning of the chain. I recommend using a battery over an adapter, seems to smooth out the distortion a bit. Overall it's well worth the $39 I paid.
The tremolo pedal is just ok, nothing to write home about IMO. It also suffers from a volume drop like many other trem pedals. I was hoping for more out of this one, if it didn't have such a volume dip I would probably be into it more. $39 also
Both pedals are supposedly true bypass, but I am not so sure. I can hear slight pulsing of the trem when the OD us on in front of it, I wouldn't think true bypass would do that.
If you're looking for a different OD pedal I would recommend this one, skip the tremolo.
Sorry I don't have any links, but you can find them easily doing a quick search.