I ordered my chicks through them during the spring. In a couple of days they will be 20 weeks old. I ordered RIR, SLW, Australorps and Barred Rocks.
All the chicks arrived quickly, were healthy, vigorous, and quick to eat and drink. I had no fatalities, one of the SLW ended up being a Roo, but that is within the 95% guarantee. I had one or two that suffered from pasty butt, but it cleared up quickly.
I've been blessed with my first pullet started to lay at 17 weeks old, and by 19 weeks old I believe there are 6 out of 10 laying.
Meyer's customer service is great too, so all around I've had a good experience with them. The only reason I'd go to another hatchery is to buy a breed that meyer didn't carry.