I ordered 2 blue Ameraucanas from Meyers about one year ago. It was a last minute decision, and when I called on a Monday (the day you can order "left overs") there were only a few left.
They were healthy upon arrival and still happy and healthy birds. Now a year later I can give you my experience.
One bird came non muffed. (plain faced). She is on the small side and produces small, but well colored eggs. She's lucky to have been sold because from what I understand, she should have been culled. BUT she's a sweet bird and a great broody and mom (I don't breed her, but she broods and raises chicks).
The other one is big, gorgeous, muffed, bearded, and full of herself. Lays beautiful medium/large blue eggs. I bet I could show her. This one I am planning to breed.
Both are black (not blue, but they carry the gene- I was hoping for a blue).
So from my experience, you can get a variety of quality. Perhaps too, since I was buying "left overs" some one took pity on the non muffed one and just sent her out without culling her. Lucky bird.
I have 10 birds from hatcheries: Mixed group of breeds. 3 from Meyer, 6 from McMurray. Another 6 I bought from a local breeder (respectable one).
I will say that I am really happy with the hatchery girls for the most part. They are very healthy, balanced birds (no mean ones) that lay very well. Some of them don't have the biggest of eggs (that are supposed to), but I'm finding that my locally bred ones are pretty much the same.
I would order from either hatchery again.
Hope this helps.
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I will get a rooster from a local breeder to expand the gene pool. 
