I know of one dane owner who has done it. Her female, although young so that may be a factor, is soooooo skinny. I can probably just about put my hands around her waist. She also told me how much it cost for her to do the surgery. I can't remember the exact numbers, but I know it was at least $1500-$2000, which although I would like to do, I simply cannot afford.
I know it would probably be cheaper in the long run. Maybe when we move back to the midwest, I can look around again. It is simply too expensive here in CA. Neutering alone, if I hadn't gone thru a spay/neuter program, would have cost me b/t $400-$500, which to me is outlandish.