Indie was spayed and tacked in April at age 13 months. It did add some $$$ to the bill and the incision was longer, but she recovered just fine. It has been some time since I had a dog spayed, so I don't remember much about recovery (and it was a Yorkie). By day 3 it was extremely hard to keep Indie quiet. She was ready to rock again. I would have had better luck trying to coax a tornado into a box. She did chew out 2 sutures by day 8 and all the rest by day 16 - so the vet had nothing to do at our follow-up. If I would have put the cone on her, she would have demolished it while I was at work - and eaten who knows how much of it in the process, so I skipped it. For me it worked out, for my sister's Husky, not so much. She chewed out the sutures and ended up back in surgery.
I, personally, have a long history of bad luck. Coupled with the fact I lost my very old Rott mix to what was probably hemangio - I wanted to try to stack the deck in our favor and not have the kids witness a very bad situation - they adore this dog. I was the one that brought it up with my vet. She said she didn't personally know of that many GSD's with torsion - but then commented that she probably just jinxed me by saying that. So I went ahead and had it done. My neighbor is a vet tech with 2 Great Danes - she thought it was a very good idea.
Copper (Lab mix) 2001-
Indie (GSD) 2013-
Spike (Rott mix) ?-2012 RIP big boy
Charlie (meow) 2000-
Puma (meow) 2010-
Nitro (meow) 2010-