It has been 1 full week of using this product and I am very pleased with the quality. As I have stated before the pumps are very good but not paralyzing as I had hoped. May be a good thing since this allows me finish my workout. It should be noted that one week prior to starting "MC IGF" I also began a cycle of AAS (trestolone &test). For the past month or so I have been running igf des and igf2 . So when I received my MC IGF I was anxious to compare it to the des which comes from a chemical mfg. It stacked up very well and I actually prefer the MC version. I like the idea of it circulating for hours. In fact I have already placed my second order and I'm still on first bottle. I know there are more details to be had and I will fill them in later. Thanks MC Staff