In my experience, the flies themselves will be fine. The hooks... That is another matter. My guess us they will be dull and rust easy but that is easy to rectify. If a guy has the time to sit down and sharpen 120 hooks (I guess you could do it while watching TV) then why not. Unless you are dry fly fishing or making show flies I think people put way too much emphasis on the exactness of a fly. I caught lots of fish on the flies I tied as a kid with zero training and only a very vague picture book. (I could kiss the man who invented whip finishers after I heard about them). If you can have a say in what they send you ask for mostly chironomids, scuds and streamers. They will work!
Now, before I get torn apart; I am not saying that quality doesn't matter. I am just saying that my buddy gets upset when I say I will take of his seconds as they are not up to his standard and I catch just as many fish as him. I try very hard to make the best quality flies I can, and though I am not a master fly tyer, I am decent and always learning. But come on, have you seen what passed for flies 100 years ago? They still caught fish.