I'm not sure where you are located, but I buy uniforms at Mervyns, Target, Sears, JCPenney, Gymboree, TCP, Gap, & Old Navy. I just try and buy them periodically when they are on sale so I buy a little from everywhere. French Toast is available in various stores as well as online, & I do like their uniforms. Target carries a brand called @Class (& probably others) that holds up just fine.
I really don't find a difference in the way they all hold up, except some of my DD's blue shirts fade, but more makers are making them with stain guards, and more fade resistant. Most stores also carry slims, adjustable waists, and husky if you need those. Our white shirts actually hold up the best because they don't fade, & bleach worked the few times stains were tough.
When DD started Kindergarten she was actually too small for most uniforms, but I discovered that the brands are very inconsistent with sizing so I had to buy her 1 or 2 pieces from various stores & makers. Now I just buy a few pieces periodically to replace outgrown ones. I also buy ahead when on clearance, nothing worse than outgrown pants in Dec. & having to pay a fortune for them online because the stores don't have them anymore!
HTH