I have a Ritchey BreakAway road bike
. I bought it to take on the airplane for a trip to Europe. It's a unique concept but similar to the S&S coupler solution
in that it allows a standard geometry bike to be broken down into parts that fit in an airline legal (no oversize surcharge) suitcase.
The pros, it is a great riding bike that weighs in at around 18 pounds for a large frame and Ultegra level components. The cons, it takes a little longer to assemble and disassemble than a folder. Honestly if your not trying to pack it for airline travel the whole procedure can be done in 10-15 minutes. The claims on the website of doing it in 5 are probably true if you work on a NASCAR pit crew