I once knew a professional mechanic that bought and used Craftsman in his business even though he knew Snap-On was better. His reasoning was; "I never break these things, I lose them." He did excellent work and there was no sign his "inferior" tools reduced the quality of his results.

As noted above, really high class tools do tend to "grow legs" unless you are the sole worker. If money isn't an issue and you can be sure to hang onto them, go for Snap-On. Otherwise, Craftsman is the bargain in good quality.