The build quality on the 2-in-1 Retrons are decent but avoid the Retron 5 like the plague. same for the Supa Boy. I cant speak to the quality ofbthe Retro Bit clones but I havent heard any complainte
i actually really like the Retron 5. Are you referring to an earlier model of it? I bought mine from gamestop in 2017 i believe and it seems to work great and the plastic is solid ...now the controller is horrible but i use originals for that