I ordered from MPC only once, but I probably wouldn't do it again. The chicks arrived alive and healthy, but I can't say that I trust the quality of their stock or customer service, in the least...
I ordered from them becaus I needed to get three chicks of a certain breed and gender, in order to increase my hens in that flock. It turned out that I lost both of my Blue Andalusian hens within a very short time, leaving the BA rooster all alone. I had to let him back in with the Orpington flock, and luckily he was accepted by the head roo without incident.
In any case, I could tell right away that the order was something less than desired, but I'm now beginning to realize that I might have received an even more "botched" order than I first suspected. I posted a thread regarding my experiences back in September, if you'd like to read more.
https://www.backyardchickens.com/forum/viewtopic.php?id=241860
I had assumed that at least two of the three chicks were actually Blue Andalusian pullets, as ordered... until now. They will be 16 weeks old tomorrow, and although they have beautiful blue coloring, they appear to be missing some of the other trademark BA traits. Their combs are still very tiny, and they don't show any of the trademark white "earlobes" yet. Unfortunately, this (combined with the explanation of the red chick's coloring by MPC's customer service) leads me to question the purity of MPC's Andalusian stock!
The "mystery" red chick has turned completely black, but has no beard or puffy cheeks, that would reveal her as an Easter Egger... so I still don't know what breed she is. I may never know unless she happens to lay colored eggs.
I don't think I could trust any orders from MPC in the future.