Ever heard the old saying 'You get what you pay for...?'
It's true.
Buy cheap chrome wheels, and get cheap chrome wheels. The chrome isn't high quality, and the wheel will have a higher change to bend/break.
5x114.3 on a 5x115 isn't a big issue at all.
I have friends running 'wobble bolts' on their VW's to fit other manufacturers wheels.
5x114.3 wheels on a 5x112 hub.
No known issues to date.