They are your typical cheap impact sockets. Not great, but not horrible either
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They are re-branded Great-neck, not the orignal Duralast. They are CR-V steel, which makes for a brittle impact socket when compared to CR-MO which is a better steel overall for impact sockets.
They also are only available in limited sizes (10-19mm for 1/2" drive) with no single store stock.
However, the OEM industrial brand impact sockets sold by Autozone are FANTASTIC. They are thin wall, CR-MO, have lock grooves and come in both 3/8" and 1/2" drive (deep and short). They go on sale for 1/2 price from time to time which makes them about the same price as the Duralast.