Brilliant bikes, Sam, and they look very spiffy too. Old friends in Amsterdam are Bromptonistas, and theirs are their go-to choice among their six bikes. On my Amsterdam-Vienna tour in 2012, David accompanied me to Köln. There, he had to return to some work, so he folded up his Brompton, slung it over his shoulder, and hopped a train back home. Florrie, his wife, commutes 40 kms to Den Haag for work each day. No problem at all to do a tram + train in each direction, sometimes skipping the tram if the weather is fine.
My LBS here in Ottawa, Tall Tree Cycles, sells a lot to the denizens of the rash of condos which have sprung up along our high street. Low-bulk-high-value items for apartment dwellers.
Looks like you've caught the wave :-)