I give Black Label the major thumbs up because I got an extensive opportunity to grill the chemist about every aspect of his manufacturing process, lab set up, etc... BL is the only UG lab using a true lab set up to ensure top quality sterile manufacturing standards. That's why it is a little funny to me when people bitch about the price of BL. (They never seem to notice it is 15 ml bottles either.) BL costs a bit more than some cheapo UG labs because they DON'T just mix powder with ouil and BA and bottle it. They have an extensive set up to manufacture juice to a high standard... most of that "standard" means enhanced sterility. It's a much higher standard than a mexican vet lab... and with all the bitching about IP selling bathtub gin... I'd think more people would appreciate somebody taking the time to make quality juice rather than just trying to make a fast buck.
BL is the only UG lab I would ever recommend to people.