Amen on CompUSA. They also had huge disdain in my experience for their customers. When I returned 3 memory sticks in a row that did not work, they were very obvious in questioning my ability to operate a computer (when I knew more about the problem than they did). I also had problems in the store with salespeople apparently assuming because I was female I was an absolute idiot regarding computers.
CompuUSA was awful. They had OK prices but it was essential that you knew exactly what you wanted. Their salespeople were useless.
They closed all their stores. I think they are just an online store now, if anything.