Ive had a bit of exp with cheaper parts and i had to replace them becuase they are just crap, but that wasnt a fully inotatable tailpiece it was just machine heads.....
I hav no doubt that the tailpiece will function properly but its a matter of; is it going to last, whereas if you buy a good one you will always know that your guitar has good parts on it and will function properlly non-stop.
A guitar i ordered (my first guitar, pos lol) epiphone les paul 100 had a bridge with to small of saddles and they rattled everytime i would play the string.
You dont want a tailpiece/bridge that ends up like that do you - cuz i had to replace it
id say just stick it out and go for the better part.