To some of us newbies we had no clue there were so many choices. I thought steroids are just steroids. But with anything you have a got a scale of good,better & best. Now I've tried a few different companies and noticed that while not all gear may be bunk(bad gear) some of it is def. better than others. I've noticed a few things up to this point. When I 1st started my cycle I was using the amps. My balls got so small & tight I knew the test was good not to mention My skin looked like I was 16 again from all the acne. But 4 weeks in I had to switch to another company that I used that sold me the 10ml vials. I noticed after the 1st injection there was a lot more pain at the injection site. I wrote this off to my inexperience & still kinda virgin muscle. But skip to 3 injections later and my balls are getting back to normal,the pain is still there and it looks like my gains have stopped. So from reading many threads I'm guessing the gear I have is underdosed or not any good at all. While there are really no sure fire ways to tell if your gear is good or not without sending it to a lab I tried to find a solution to ease my mind. I found a thread in which they talked about freezing the gear to see if it crashes. I was going to do that but I was afraid if the gear is good, crashing it will make it no good.This sucks because the sponsor is a well liked/well reviewed sponsor on here and I have 6 or 8 more vials of the same stuff. When I tried checking the lot number on the website it ask for something that is not included on my labels(serial number or a 13 digit number & my lot #'s only 6) so there's no way to check it.I can say lesson learned and I will spend the extra money next time to go with a rep. company but even then nothing is guaranteed. Any thoughts? Someone care to explain the diff. in the variations of gear as posted in the title?