If we had star ratings, I'd give yinz a 4 :P
The products are great. Everything came as I ordered it, packaged great, etc. The products themselves that they carry are top-notch. You know if RSD has it, it's a quality piece. Their website is clean and readable. Great for searching just what fits your car with their filter.
One negative comment - shipping. I did choose for regular UPS ground shipping... but it took 12 days to reach my place. Seems a bit excessive.. but meh, it is what it is.