I will say that I personally prefer an EE (Americana) over an ameraucana. They will typically lay more eggs than the purebred, they will still be colored eggs (blues and greens), they will usually lay through the winter like purebreds and most other hybrids, and will come in a variety of different, interesting feather colors.
They will typically provide everything you are looking for in a purebred, but just won't be "show quality".
On another note, i am shocked that TSC allows returns if they intend to put the chicks back in the bin. Seems like horrific bio security measures. Another reason why we exclusive hatch our own babes here in the primary laying flock.