I've had dark grey H within the past 4 months in the ATL. I've gotten both rock and powder. Powder sucked, but the rock had a vinegar smell and was pretty good. Test strip came back + for H and no fent, but drug screen came back as fent. Of course, that's a screen at a methadone clinic, and I don't fully trust them. I test my H and it always tests + for H and - for fent, yet the drug screen always comes back as fent. My guy says that his connect doesn't mess with it if it has fent in it. I've had to wait a week or so because his re-up tested + for fent, and he didn't get it. Who knows, though.