After a recent experience with Craftsman, I have renewed my desire for more Snap-On or MAC tools. I had a set of almost new Craftsman 12 point metric sockets and rounded the head off a 12 MMM bolt. I didn't have a 6 point socket, so I sawed the bolt head off. A set of Snap-On or MAC metric sockets are now on my tool wish list. There seems to be a significant difference in the fit between Craftsman and the pro grade Snap-On and MAC sockets and wrenches.
Over the last year, I've begun upgrading my Craftsman sockets to Mac. So far, I've replaced both my 1/4 drive and 3/8 drive metric stuff. The difference in quality is immediately apparent. They are, however, very expensive compared to Craftsman. I bought deep and shallow sets of both and spent nearly $650.