I gotta say how much I love my Cast Iron Duo cookset. I used it for every meal for 4 days, and loved the versatility. The smaller size was perfect for me solo, and would work well for two as well. The cast iron heated up faster than I expected, and I like the ability to use the set on pretty much any sort of heat; campfire, gas stove, or coals. In fact, since I hate hot food on cold plates, I often put a plate on the burner for a few minutes to warm it up. Decadent!
The whole thing, minus one of the plates, stacks in a SP IGT storage box.
The only downside is the price, which SP has really jacked up since I bought mine. Which is a shame, since I would have bought another set for the cabin...