I've had my double cab for about a month now. I really love it. It drives like a car. I especially like the power rear window that rolls down. I get about 16 mpg driving to work, which isn't great. But I didn't buy a truck for the gas mileage.
Power rear window, reliability.
Would prefer that the back seats fold up toward the rear, instead of toward the front. I have keyless entry (keypad that locks/unlocks door with panic), but Toyota does not have a dealer installed alarm upgrade. Alarm upgrades that are installed by the dealer are after market.