I have come to the opinion that quality matters a lot in 1/4" drive. I use mine a lot, on automotive stuff I use them almost exclusively with the 3/8 and 1/2" being rarely used.
I too had Craftsman (and SK), then upgraded to Proto, and finally to Snap-on. Although you won't break the 1/4" drive sockets much, the quality makes a huge difference in how many fasteners round off and slip. I have a small fraction of the round off and slip failures with the Snap-on that I had with any of the others. I currently have Snap-on, Proto, and Williams sets. Of the three, the Snap-on is by far the best. The Proto and Williams are about equal, and not as good. All three are much better than the Craftsman and SK I previously had. The Craftsman were just ill fitting and the sockets wore/stretched out. The SK were thick and clunky. The Williams aren't machined/broached as well, and I had problems with a few of the Proto stretching/deforming. Those were warranteed, and the new ones were better.
If you feel the need to upgrade, I'd go right to used Snap-on if you can find them. Or, at least buy the small sets of shallow ones, even at retail. These have been my best investment in Snap-on, right up there with the ratcheting screwdriver. I like my other Snap-on, but for most of them, some of my other tools are about equal. These small 1/4" sockets have no comparison in the other brands I have tried. And that has been a good selection: Thorsen, SK, Craftsman, Williams and Proto, along with an assortment of mixed brands I've had from time to time before I got nicer sets.