Just received my Tenma 72-10480, which is basically a rebranded Korad, though interestingly only 3A and not 5A. It still has the binding posts rather than sockets.
Naturally I immediately performed a teardown, and found the construction unsurprisingly identical to the Korad. Interestingly though, all the caps, at least on the output side, were from what I could tell genuine Rubycon caps. 105°C jobs too, which seems to be a step up from the "wan hung lo" caps that were in the Korad, assuming they ARE genuine.
Anyway, I caned the thing on my redneck load tester (10 ohms worth of nichrome wire in a bucket of water) over a couple od fays and it hasn't complained yet, so that's not too bad.
One issue I did have initially was a rattly fan. This initially sounded like bad bearings, but upon further investigation ended up being the fan control being very coarse in whatever it does. There must have been some very sharp edges in there, which were causing a mechanical and then audible movement in the fan. Bodging on a 33uF electro across the fan smoothed it out and now the fan no longer makes any nasty-bearing noises.
All in all, reasonably happy with the unit so far, but of course the real test will be time.