Nissen parts? Good Quality?

Okay, so I have a 2001 Audi A4. I needed a new radiator, radiator support and an ac condenser after my fender bender. I got the support from the dealer, but we found the other two parts for way less at another shop. They're Nissen brand, and I wanted to know how long they would last? Does it make a difference that it's after market?