I've only used Z once (about 2 months ago) for some Drostanolone Propionate, and it was a pretty typical transaction: sent payment, received product about 3 weeks later.
BUT: That Masteron, at 1cc, made a hard lump at the injection site the size of a golf ball the first two times I used it, so I stopped, to see if a sterile abscess, an infected abscess, or a nice staph infection was in my future. The bumps went away, and they never became red or swollen, but damn that hurt for a couple of weeks.
If you order Z's domestic line, realize it is underground sauce -- someone here in the states is receiving the powder, cooking it up, packaging it, and distributing it. You never know what you're getting with UG gear.
Gone is the soldier, gone to the wars...