Hey there! All of the above and more are true when it comes to Serama eggs.
One thing to keep in mind... just like in dogs and cats and horses, not everyone is breeding with the same goal in mind. Some folks breed for performance (race horses may not win a beauty contest but better be fast), some breed for production, others for obedience and yet others for conformational beauty. And, some just for fun and or money.
With that said, you aren't going to find in any breed or species every single breeder being of like mind and having the same goals. Even if there is an established Standard of perfection!
Those bashing other breeders are not really accomplishing anything but carrying on in a negative manner... very unbecoming if you ask me.
You, as the purchaser, should be doing research to find breeders that are producing the kind of animals that you want to breed yourself. If you like what they produce, then that is really all that matters.
I have had very good results with shipped Serama eggs. Upwards of 50% and my friend Jim has had close to 75% - he's a very experienced incubator hatcher. What I haven't had great results with are the quality of the chicks I've gotten from those eggs. I have culled (given away) all but 2 from over 20 recently and those 2 are questionable but since they are hens, get a longer review period. I have a very specific idea of what I want in my Serama and so, have my own goals in mind.
What part of the country do you live in? I'm moving to WA in roughly a month - if you are close, I can always swap some eggs with you are something and you can give them a try.