Incredibly ugly and impractical, with aerodynamics that only matter past 80mph.
This is like the adams probe 16 (which was a pocket ferrari powered by an anemic austin lump) when a more practical (and saleable) fuelcell vehicle would be more like a Kei van - something with a form factor like the Suzuki Wagon R.
Rationale for that statement: small output, regenerative braking with supercaps (which are very limited in their energy storage), low pollution -> an ideal stop-start city transporter, not an open road cruiser.
A final thought for that design: the hydrogen tank is _very_ exposed to a rear end collision. Not a good thing when it will be operating at ~ 40MPa