I would say that iNet Access SSR 1921-Tivax clone is as good as any box can be, unfortunately CC letters are too small.
The second box the newest model COSHIP APT is good. the largest CC letters from all boxes, larger than Sony20 TV CC, make it see thru- trasparent, colored etc. super, only problem is must go to Menu to access the Service-for CC, iNet/Tivax has it on Remote.
'cause the box consume 12W (rather than deficient 8WEnergy Star of iNet/Tivax) it has ability to pick more channels from air; main switch off/on like TV,DVD,VCR in the back is great
and of course as any other boxes the CC letters are locked on screen while you are already at other channel and only the CC fron next ch. pushes it away or go to TV CC.
Unfortunately the Remote stinks, seems to be deceptively too slow, sometimes INFO shuts off the box.
Even so, I would vote -1- Coship APT gives more ch.s than the -2- iNET/Tivax.