It basically comes down to this. Buy cheap, you'll get cheap. And I'm talking under the OEM cost which is $700.
The people who complain about leaks and cruddy quality, bought cheap.
Spend the money, it only hurts once to buy the best. Do your research, go to the dealership and ask what they put on as a aftermarket install, or when a customer requests a install, and who. Like on the 300c Hemi.
They won't put junk on something runs upwards of 50k.
And if you go through the dealership (like I did) the install is also covered under the warranty.