The Bike Friday suitcases are Samsonite F'lites. It looks as though they have now moved to the new model with the D handle. we have the older model with the U handle. You can see both here: http://shop.samsonite.com/s?brand=s&...Keywords=flite.

We have been happy with ours which will hold an old style Birdy, 2 helmets and a bunch of other stuff. The new one is quite a bit lighter so if you get the opportunity I would compare the 2 for strength. We don't have the gear to use it as a trailer so I've not checked the fit with that. As a Bike Friday will fit in it, I would also expect a Birdy to do so but would want to check before committing.

You can see my photos and those of others here: http://www.bikeforums.net/showthread...t=#post9057232