Comment by bluGill

I used to. Then I bought a part that didn't fit (a switch that obviously didn't have the right number of terminals), and the return process turned me off.

I still check them though as they often have good enough parts for a lot less than OEM prices. Though I also still go to the OEM when I get tired of third party parts that don't work (after the switch issue above I went to my local auto parts store - the switch fits but doesn't work, I'll see what the OEM part does. Rock auto was $8, local store $20, deal $140 - but I trust the dealer switch will work for another 20 years)