I tend not to read manuals, but I read the manual on my Ridgeline the night I brought it home. Having owned Hondas before, I knew there were going to be a lot of 'hidden' features that I probably wouldn't discover otherwise.
I have scanned through it two or three times since I first read it to pick up information that I had either missed or was unclear about. But then I am one of those "techie" types.