I had to resist purchasing a so-called "deep" cast iron skillet that was on sale for a good price because I couldn't imagine what I could do with it that I couldn't already to with my regular cast iron skillet or my stainless steel saucepans...
This particular skillet is just over three inches deep.
I've been slowly crossing over from teflon to cast iron, so I like to grab good north american-made stuff if I see it on sale, but I just couldn't justify this one because it seemed a bit niche.