These are actually brilliant campaigns. I'm currently on the 4th campaign and the experience is astonishing! They are also much harder than in original Starcraft 1 (try to complete mission 5 of the 3rd campaign on Brutal, that's a challenge even for some Masters), and introduced cinematics, while pretty lame, still make it more like a modern game. The only thing I didn't like was this 3rd person shooter in two missions, it kind of broke the atmosphere, but then, again, you can choose a standart mode for these.
gl hf ;-)