I’ve purchased plenty of rtors and pads from RockAuto and they are fabulous. Additionally, i notice your picture is of Powerstop rotors and pads. I’ve bought Powerstop for several of my cars. The drilled and slotted rotors are A-MAZ-ZING. I highly recommend them, as they warp way, way less than other rotors. It’s incredible how much heat they can take.
Having said that, the Powerstop pads are another story. They are built for *racing*. This means an unusual break-in method and they don’t ‘grip’ as hard until they get really hot (like they would if you were road-racing/rally-crossing your car). This means that your braking won’t be as good under normal, everyday conditions that 99% of us do. I experienced this on a 2006 Honda Odyssey, a 2010 Jeep Wrangler 4-door, and a 2005 Subaru Outback. This is not a defect in the pad. They are designed this way because they are a racing pad.
I’ve since just bought ‘normal’ pads and they work great.