Build your own. I bought one of those little prefab coops last summer when I started raising chickens and in a week or two I'll be ripping it down to build a proper 8x8' chicken house in its place. It was about the quality you'd expect for the price you pay - flimsy, not very waterproof, and small. Way too small to add on to your flock whatsoever, which trust me, almost everybody ends up doing at some point or another.
It was adequate for four bantam silkies but no way could you comfortably fit more than like, three standard size layers in it, tops. And even then it'd probably be cramped. Unless you were raising bantams literally in a fenced-in backyard where you don't really have to worry about predators, I wouldn't recommend it at all because a raccoon will rip the hinges off this thing like it's nothing. I replaced the original hardware
If I had it to do over again, I would not buy a cheap prefab coop. Waste of effort and money, because now I'm going to have to build all over again AND figure out how to house my chickens while I do it.