This is the first time I’m using Qtropin, although I have used a liquid rHGH product from a different lab once in the past. These are 100iu vials, premixed in a stable liquid. There have been a few claims of this product being incredibly similar to Pharma grade, and I am excited to find out for myself. In the past I’ve been hesitant to use premixed HGH, as questions of long term stability come into play, but there are plenty of consistently great reports from reputable members that have used this brand. The shipping was VERY fast, like 4 days from payment confirmation to my door in the NE US. Also, the shipping method is extraordinary. If I could post photos of it, I would. I am impressed by the level of professionalism and forethought into getting the product to its destination in pristine condition.