I have tried them in the past and was very satisfied. Tren hex is a great compound, something about it feels cleaner than ace, still a very volatile substance but the mental roller coaster isn't as intense because of the more stable ester. It's was actually my first tren cycle, currently on my first run with ace. As for the primo, my body has a permanent new "look" after 16 weeks of the primo. Gains are slow and stead but everything you gain is solid quality mass that you will maintain after you discontinue the drug. It absolutely changed my "look".