I've just made my last purchase of router bits from China. Up until now they have been ok for my purposes. But not this time. I am in the process of building a nice cabinet for the bathroom wall for storage. I put in a brand new flush trim bit to flush trim the face frame. Within 6 inches of the cut, the bearing exploded gouging my work. Thankfully, that side will be against the wall, but still slightly visible. It had me gun shy about using the round over bit from the same kit. I wound up using my block plane to trim with. BTW, just ordered a Whiteside. Hopefully will have better luck with it.
Others have always told me to buy only the bits that you need and buy quality. I do believe they are right.