Campfire In A Can is by far the best (and most expensive) one on the market. It's fully adjustable flame can put out a huge fire that many people can sit around and stay warm. I've had one since 2011 and use it just about every trip.
However...
I was one of the many folks that KickStarter supported them on a wood/gas version that they never came through with. They even took shipping costs from us and didn't return it. So I have a hard time suggesting the unit.
But to fair it is really good. It does eat a lot of propane on high.