I havn't juiced since all the busts. I know that I never once had a single problem with the UG lab I used. Used them for 4+ years and hundred and hundreds of shots later im infection and abcess free and put on plenty of muscle because of their gear. I know more guys that would agree with me (that have used good labs) than will disagree.
If its a reputable lab you shouldn't have to worry about quality. Since all the busts, though, the labs are more likely to underdose due to trying to make it more worth their while. Like I said, if they're reputable I wouldn't worry.
It all comes down to your budget, i believe. If you can't afford human grade...chances are youll go with UG. Thats me. And I've never had a problem once in all my years.
In the end human grade is always better. If you can afford it, go for it.
Chris