Transforma was my very first foray into gray tirz, probably around October 2024. Of the single-vial vendors I first found, they had better prices and it felt the same as the branded Zep I was using at the time. It arrived quickly from Kansas City. I went on to use them for a couple more peptides I wanted to try--they had competitive single-vial prices and sales sometimes.
*edit--just now noticed you are in Europe, I don't remember if they ship to EU or how much shipping would be. If it's over $50 USD I would just find vendors that sell kits, not waste money on single vial vendors.