I had a Biomega Copenhagen roughly bought in 2005 and used as urban bike for a few years.
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I loved the design, and clean style, also the fluorescent lacquer, but I start to hate the shaft drive.
I only have dismounted the rear wheel once, it was a major challenge and took me 2hours and a lot of sweat and tears. From now on I have only used patches for flat tires and tried to apply them without dismounting the wheel, of course also not a easy job finding first of all the issue, but this was even the way how it was officially recommended in the manual!
Also the shaft doesn't allow wider tires and produced a bit of noise.
It was indeed also not my fastest bike, but this could be partly also caused by using an integrated gear hub.