We just finished our pool and wanted a not-so-permanent fire pit outside on our deck for ambiance and cooking more than anything.
We went with the Solo Bonfire.
The short answer to "is it smokeless?" is "kind of".
The way it works is, there's a set of inlet holes at the bottom that channel the air in two different places, 1 - straight up through the fuel source, and 2 - up the side and out a second set of holes at the top.
It's supposed to kind of ignite the air a second time as it's exiting the top of the stove, thus eliminating the smoke.
And it does... but you have to supply it a ton of fuel to keep it hot enough to get that secondary combustion.
Which is fine if you've got an abundance of wood, because it goes through it pretty fast... but in Florida it's hard to find firewood without buying truckloads.
We opted for the cast iron griddle, and it does a hell of a sear on a steak - and cooks fine for me - but if anyone likes it medium or above, you might have some issues getting it up to temp without finishing in the oven.
As far as how much heat it puts off - unless you're standing right next to it, it doesn't really provide much in the way of radiant heat.
So if you want a pit to provide warmth as you're sitting around, you might want to look at other options.
All in all , I like it. It's a cool gadget.. looks nice, but I would be disappointed if I were using it for a heat source.