If you are looking for something that handles the technical side of thermal regulation better than the average shade, I would look at the Intro-Tech A...
Iirc, the official tray is kinda slippery for groceries, right? Honestly, I'd basically look into velcro-based blocks that grip the carpet direct...
Yo! Late to the party but honestly, if you're looking for high-end specs without that Thule tax, you gotta check out the Rhino-Rack Vortex ROC25 Flush...