I saw a post on another LR forum about someone in the Southwest that took delivery of a new Discovery with 3-zone AC and it is inadequate. He runs it on "low" all the time and he is still too hot. I took a closer look at the new Discovery and he is correct. No more center console vents for the second row, no more ceiling vents. Just 2 small vents on each b-pillar. Zero vents for the third row. My dog wouldn't be happy about that. I guess you need to order the 4-zone AC to get more vents. Too bad it's bundled with crap that I don't want like massage seats and a metallic windshield that will jam my radar detector.