I know this isn't responsive to the original question but let me please share that I've been flying for about 20 years with S&S bicycles. I now have three of them, including a Rambouillet that was converted by Bilenky. The fact that I have three of them should speak to my opinion on the functionality and I simply want to remind the world that the option exists.
Yes, you have to figure out how to manage the case. I have a few different approaches, including groveling to the arrival hotel for storage, or nearby bike shops, or friends. Yes, unless you ship the case, you probably have to return to the point of arrival. On the other hand, it's a reliable and predictable and fairly bullet-proof solution.
S&S bikes are unloved by the market. I paid less for the complete Rambouillet, nicely built up, and including a hard case, than the Bilenky conversion cost the seller, so there are deals to be found, but not deals on specific, fashionable, or new bikes. My first coupled bike, a Gunnar Roadie, I paid $1200 for with Ultegra and expensive wheels and a case. Once I sold off the parts (I had lots of Campagnolo inventory on hand) I was into the frame and case for less than $400, about what the hard case costs new.
Once, early on, I overpacked the hard case and the airline tried to hit me with a substantial surcharge. I repacked the case and got various bits and pieces into my carry-on and avoided the surcharge thereby, but I had to sweet talk the security people. In other words, I learned to always weigh the loaded case before going to the airport.
~pb
Gunnar leaving Orleans and westbound on the Loire