I chose Welsummers for a couple of reasons. The primary reason was their heat tolerance since it get upwards of 112 degrees during summer here in Redding, California. They are smaller but still robust enough for meat, although we're only raising ours for eggs. I love their auburn coloring, and the roosters are beautiful.
We got our Welsummers from a local feed store, who in turn ordered them from a huge hatchery in Arizona. I would have preferred getting them from a Wellie breeder, but that wasn't an option at the time. If you want dark chocolate, speckled eggs true to the breed, order your chicks from an established breeder.
But we adore our flock. They're all Welsummers and get along nicely. Our hen Gertrude went broody earlier this summer and sat on several eggs during the heat. I won't let her sit on eggs after May anymore just to be safe, but was great throughout the three weeks. Very loyal to her clutch and protective, but not mean, and of the five that hatched out, she has been incredibly attentive. They're about three weeks old now and she's still fluffed up and clucking like a proper broody hen, and she takes wonderful care of them.
As for size, Gertrude is a very large Welsummer, and our hen Rosie is the smallest, and yet they both are good layers with eggs that are nearly the same size. The hens used to jump on my back whenever I'd kneel down, but now they're too heavy for that. But with the chicks every time I kneel down I'm covered in them. They also run to me every time I approach their yard.
And Henry the Rooster, well, he's my buddy. I adore him and can't imagine not having a rooster. I've been very happy with my Welsummers. I gave them four stars only because I thought they'd lay eggs throughout winter, as I've read elsewhere online. It's possible they will this winter and that their age and/or molting were why they stopped, so I'll be sure to come back here and update my review.
Oh, and I meant to say: eight of the ten eggs in Gertrude's clutch were fertile. Henry's a stud muffin!
I hope this was helpful. Cheers.