This appears to be the exact pan that Martin Yan always uses on his PBS show ("Chinatowns") -- he almost never uses a wok, and when he does, it's the Circulon 2 wok (which I don't have, because who needs it with this 12" stir fry pan). Granted, I'm sure that Circulon sponsors his show, but it's still a good pan.
This pan is most useful as a wok replacement. Because it doesn't have a flat bottom, I can't use it for everything (e.g. omletts), but I also frequently use it in non-wok situations such as pasta sauces. At 12" it can fit a surprising amount of stir-fry, enough for 4-6 people if it's filled to the brim, but occasionally I do wish Circulon made a bigger stir-fry pan besides their wok. I also wish it came with a lid, but I own a 12" lid from another pan, so I don't need one.
After owning this pan for a year, I am so impressed with Circulon that now I always search for pans in the Circulon 2 lineup before considering anything else.