I think this is a great deal, especially if you buy more than one. At walmart, it's about 26.95 for a set, so already 1 set is 2 dollars off, AND you don't have to drive. If you buy two, then you're saving 7.
Okay, so more info about these sets.
The stoneware, as in the mugs, are MADE IN CHINA.
I bought two sets a while back (not through woot) and they stack wonderfully. The stack of 24 plates/bowls cant be more than a foot high. They are heavy, since there are 24 of them, but individually they are very light.
So what is corelle made of? Someone asked if they are plastic. No. Not only are they not plastic, they are not ceramic or stone. Corelle is made of glass. More specifically, tempered glass. This is what gives it its chip resistance.
However, this also means you should be careful with thermal shock (be careful how you heat, if you do heat). I believe they give you instructions on no-nos for these things. Stovetop burning will make it shatter!
Tempered glass also makes it so that if you do break a plate, it will shatter into tiny pieces and slivers instead of large chunks. Someone mentioned this happening to them. I don't think this is a big issue as they are difficult to break, but it's something to consider.