We don't have any experience with the Kuuma grill, so don't know how well it's constructed (or not).
A few years ago we purchased a similar grill, the "Magma Trailmate."
http://www.anchorexpress.com/magma-conn ... 7AodIEAAYQ
Magma is a major manufacturer of marine grills. There is probably not a sailboat anywhere that doesn't have one of their (round) kettle grills.
We wanted something smaller, and George Hone (who used to manage a large WM store in Nanaimo) referred me to the downsized Magma "Trailmate."
It works very well and doesn't take-up too much space. The 1#propane cylinders seem to last forever. The 9"x12" grilling surface is rather small but you adjust to it. I wish it had a thermometer in the hood - but I guess you can't have everything.
After about four or five uses the control valve broke, and we played hell getting Magma to replace it under the warranty; but they finally came through. Now ... to protect the gas valve, I trimmed a beer 'coolie cup and to fit over the valve (which I leave in place on the propane cylinder but removed from the grill).
Cleaning it is a bit of a pain, but I've committed to cleaning it every couple of years (or so...).
Best,
Casey&Mary