Accurately dosed and IFBB Pro approved aren't necessarily the same thing! I don't think anyone here will trash Syn quality but again it comes back to managing your expectations, you want gear that accurately dosed to the label you need to have testing to show it. Won't get that much here. Jet has most things tested though, so if knowing what's in the product matters to you, he's a good option.
So figure out what you want, do you want reliable IFBB pro-approved gear at a price premium, do you want tested gear, do you want pharmaceutical grade gear, they're all different and you need to know what you want first before you ask for help finding it