if used IP.. in fact, its all i use. ive had very impressive results with tren, deca, and test. IP is just the type where users will either love it or hate it.. i actually made a post about it and got mixed reviews as im sure this one will have.. like said, some users find it unsafe and of questionable value, and i myself have seen some unusual effects from their tren, although the overall results were not only noticeable, but easily maintained in my instance.