I first used MPC back in 2010 to order 8 babies, and they arrived in my somewhat small and faraway town in a peeping box all alive. One faverolles died the next day, but that happens. Of the 7 left, one turned out to be an accidental roo, and they got one of my breeds was wrong. But they thrived and grew into nice birds. Also,
However, I've since added more birds to my flock that I got from breeders and I can definitely see the difference between those and my hatchery girls from MPC. Number of eggs per week, how long they lay, how big they get, and how resilient they are to illness: my breeder birds win over MPC every time, in every category.
That said, I'm looking to get some eggs to put under a broody hen, and here I am considering MPC again. They just have so many different breeds (man, they've liked quadrupled their selection in the past five years) and it's so easy to mix and match for a small clutch. From most other places, I'd either have to choose between a dozen of one breed or a "rainbow mix" of leftovers. Man, I wish there was a MPC for breeder-quality chickens!
Also, MPC has a faverolles/ameraucana (favaucana) "designer-cross" now! I got one of those by mistake when my broody absconded with an egg from my MPC faverolles hen, and now I can tell people she's a designer chicken