I never ordered from GYC. However, I remember after the zero peptide fiasco occurred, where most vendors who had shipped them disappeared, GYC conducted reshipments. I would order from GYC now if I had a need for additional peptides. I'd be more hesitant with MIX because MIX is new. Of course, every vendor starts out new. As others on this forum frequently point out, and I myself found out with Tracy from QSC, just because a particular vendor has a record for reliability does not guarantee that you'll get what you paid for. Still I'd rather buy from the vendor with a good record.