I've never had a reason to try one. You don't make them sound fabulous. I'm thinking i could get a meal for less on the road most places (including frozen microwave type) so I wouldn't do it to save money. I don't travel anywhere that dangerous or confusing. And part of the appeal of camping is outdoor cooking.
I'd try one but wouldn't buy them by the case. That's for sure. You might call out the best and worst in your opinion here for those who would try one or two.