I know it's been pretty much panned in the media, but I have to say I don't really see why. Did it follow canon? No, not really, but far more closely than some movies I could mention (*cough*Starship Troopers*cough*) and certainly not a worse interpretation of an old Edgar Rice Burroughs story than others (hello, Tarzan!).
The Tharks were thinner than I imagined them to be. Princess Dejah Thoris kicked more butt than I remembered. The thoats were done very well. Wolla the calot ("monster-dog-thing", Carter calls him) was excellently done. There were shout-outs to other movies (ha! Carter covered in the blue blood of a White Ape looks very very Braveheart). The people of Helium wore more than the strategically-placed jewelry mentioned in the books, but I imagine that to do otherwise would have pushed it past PG-13 and it is Disney, after all. The airships were beautiful. Sadly, Sola did not get to say, "my father's name is Tars Tarkas".
So it wasn't a great movie, no. But it was a decent action flick, especially when keeping in mind the source material (written a hundred years ago and more than a little dated).
And then there were the previews... between Brave and The Avengers I can see it being a busy summer, movie-wise. And I want to take Abby to see Mirror Mirror.