The shipping cost is annoying, but even with that taken into account it's a good deal. You definitely don't want teflon if you want it to last. I'm not sure why the GoWise rep said it can't be used for canning. That's purely a matter of temp and this should have no issue at 1000W and manual temp settings. Bought this as a replacement for my crock pot - summer's here and this should pay for itself in energy costs by the end of July. I don't use the oven very often from now until October.