So to be fair, this isn't actually my sun oven. It's my mom's. But it pretty much rocks my socks. I've made rice in this oven....beans, chicken, cookies...all sorts of things. And they all come out fantastically (and it has nothing to do with the chef whatsoever). Seriously, sun ovens are great. They really keep in the moisture while slowly cooking everything to perfection. I highly recommend it.
The only thing is...on one model of this oven, the little metal tab that turns to lock the cover isn't painted with the heat resistent stuff so it gets VERY hot. Just know that you should probably use a pot holder or something until you know how hot yours gets.