Cool concept, not a great promotion of the project. It really seemed to flounder underwater (pun not intended) and the dry footage they shot wasn't impressive either. Still, if this is the first attempt, not bad. I probably would have chosen a hardtop with windows myself...
I can't just yet say whether it's a cool concept or dumb. No doubt, it'll be expensive, and probably not worth a big premium because it can go underwater. I think other amphicars have done poorly because:
-there's no real need/ market for this (except for the very rich)
-either as a car or as a sub, it's only adequate, and probably not very good at either job