Note I did not point to the
cheaper one.
Mine has done great for years and has been used to break loose AXLE nuts! The NiCd batteries are failing and I need a new pack, but that is to be expected.
Using anything that absorbs shock like extension is bad on any corded or cordless electric because they use different, shorter throw hammer mechanism than air tools. All that impact gets eaten up by any slop/play from the gun to the hex.
In some cases, you have to help the socket with your hand. You are not actually loosening the bolt/nut, just keeping the socket tight on the forward edge of the hex.
DK did burn one up, but she never lubricated it and the gearbox failed.