If you look at the "about us" section on their site, I don't see anyone with human performance expertise (though who knows if any of them are hobby cyclists with a huge depth of knowledge). The seat and pedal design is definitely geared more towards aesthetics than performance, too. I probably wouldn't want to do more than a hundred watts on there.

I definitely appreciate that the portability and aesthetic quality is a major design consideration for them, though. I see this more as a battery pack that you can pedal, than a bike that stores power.