I assume you are talking about this unit (the small two wheeler with the accordion internals)?
http://www.koffer-direkt.de/neuware-...ley-41-cm.html

I get the impression Rimowa mostly has success with this in their home market. Maybe not so much in the US market.

I think the challenge with the two-wheelers is their capacity-to-weight ratio. I remember looking at them when I ended up buying the Bolero IATA four-wheeler:
http://www.koffer-direkt.de/rimowa-b...ata-55-cm.html

But I think for your use case it sort of makes sense. Its a niche product, but a good one.