My kids have been in uniforms since preschool. I have 6th, 4th, and 2nd graders. They have never known any difference. I love it! They all look the same. You can't really tell who has the "money" and who doesn't. It puts them all on a sort of level playing field. I think it also creates a more comfortable environment for them to break out of small circle of friends or clicks. We have only had very positive results.