Serge is hands down the fastest overall for replies/shipping etc. (Just my opinion). Always a real pleasure to deal with this super nice guy. I have nothing but positive things to say on this source, being with them since 2018 and always happy.
Last time I have used Jins was summer 2020 and found it better than the genos pens. I will save those beauties for spring/summer. Jintropin ARE pharma grade ! Reason I prefer it over some European stuff is it's powder so not reconstitued YET.