I say I've got one in the back of my truck- it is, IMHO, the best thing in Cold Steel's product line, and has been for a couple years.

However, I do carry real shovels when I can. For years I carried a cut down shovel in my trunk, and I had a grain scoop-type snow shovel that I cut down and remounted the D-handle on for camping. Right now in the truck I also have a square-tipped, straight sided spade- it works better for getting under the truck for digging out in winter.