I've been using the one that comes free with the radio, a z270, so why would a 50 dollar servo be worse than that? I don't have to replace it, i choose to replace it.
So if i get what i pay for and i pay 50 bucks, that should be 60% better than the one i have, so i can live with getting what i pay for.
This is a budgeted hobby for me, i have no intentions on going all out.