I was annoyed to find that my Aerospace would be at the Breitling repair depot for 4 weeks just to have the battery changed - at a cost of £35. The reason for the cost seems to be that the seals are also changed with the battery and the watch is pressure tested. It did come back in a rather nice soft case which I actually use to keep my shades in. :cool
I love the watch except that the tabs on the bezel catch in the stitching of one's trouser pockets and pull threads when said hands are removed. I wouldn't change it for anything and I certainly wouldn't take it to an ordinary watch repair shop.