Little late to the party on this one but I'm new. I always keep a supply of pharm grade AI's on hand. There are many UGLS I trust and have had success with their AI's but like everything else, sometimes you get a shitty batch. For the most on a blast I will use pharm AI's and when I cruise I will switch back to UGL. It's much better to be safe than sorry. Nothing can ruin your cycle like scrambling for an AI when the UGL stuff turns out to be bad. It's happened to me a couple times. Gear is great, AIs not so much. Not sure why that is.