My experiences with Campagnolo brackets (both my own and working of friends bikes) are negative. They are crap. I've owned or worked on perhaps 5 or six different ones, inc Record. The only positive thing I could say about them is that they look nice. Campagnolo make some nice equipment but you can't include their BB's in that category. I also have two mates who own bike shops - ones a big Campagnolo fan and the other isn't, but both of them despise Campagnolo BB's.
Apparently Centaur was upgraded this year - hopefully better than the old model.
My experiences with Shimano square taper BBs are mostly positive.