I've used a fair bit of Renvex. And have had blood test and good results from there stuff.
I now make my own gear. But can state that they are okay. Got very little pip (none at all) from there t400, which although annoyingly dosed was a good mass builder. I'm not sure why they put such a pathetic amount of test p in, but it's good stuff.
Any more questions then ask. I know a fair few guys using renvex so should be able to get info on anything they make.
Would not use their AI's or SERMS though. Use pharma for that stuff. Just not worth the risk.