Being a hobbiest, I don't nessarily need proquality tools, for the most part Craftsman are fine with me. However, I do see how someone who did it day in day out would want tools that feel better in your hand and are made to be slimmer. This week when we pulled the headers back off of my Kids T I had to go get a MAC 3/8 wrench off of my pegboard because the Craftsman one we too thick and wouldn't slip over the bolts because of them being so close to the header tubes. The MAC went right on.
Don