I drove the Clarity FCEV fuel cell 8 months ago and the Clarity BEV 3 months ago.
Both are what I consider luxury passenger sedans.
The FCEV version was good but lacked any battery capacity (1.7kW?). The car makes electricity for the drive motor on-demand from hydrogen gas. Consequently the performance in both acceleration and re-generative braking was weak IMO.
The Clarity BEV had better response although the strength of the regenerative braking was minimal. The battery capacity of (25.5-kW) is inadequate for an electric only car IMO.
The Clarity platform is ripe to be a combination of the two above options.. an FCEV/BEV Hybird! ..
Until a 'dual fuel' Clarity EV with a 25.5-kW battery pack AND a fuel cell range extender becomes an option i don't see either of these two cars selling well.
-- On the other hand If/When a FCEV/BEV plugin hybrid comes to market from Honda or anyone else I expect runaway sales.