I have seen them at the LHBS, was busting a little on Keith. Always read about problems or breakage. Since I don't have problems I don't see me buying one.
I've never had problems starting a siphon either, but you can just sanitize the autosiphon, pump all the sanitizer out and with a single pump start the siphon without having to worry about putting you hands on the ends that will touch your beer or worry about what to do with the sanitizer or water in the line that you are using to start your siphon.
Yeah, they break after a few months if you are not really careful. And if you don't want to use one, ok. But why so many people have problems using them .... that's what I just don't get when it has been a really nice and functional too for me.
I ferment in sankes now and use co2 pressure to rack my beer so I don't even use them any more. But if I was in carboys or buckets I'd go back to the autosiphon because it is so darn convenient.