Commercial charcoal is pretty good for camping if you want to cook over an open fire, and can't use local wood. I actually prefer it. However, it's pretty much a camp luxury. I've often wondered how it'd do for backpacking. A couple briquettes are sufficient to cook a single meal, give off lots of heat for it's size.
Having grown up here in So CA, I've never really had much opportunity to play with coal. AFAIK, it just isn't used very much around here except maybe for a few industrial applications.