The urban vehicles of the future will be bicycles, and to a large degree, also the urban vehicles of the past - human feet.
What advantages does this gadget have over a bicycle? I don't understand the engineering fad that places two wheels in an inherently unstable configuration (side by side) and uses valuable energy to maintain stability. The bicycle does this for free, because it is an overall smarter design. It stays upright at very little energy cost.
Urban transport problems are not problems of vehicle engineering, they are problems of logistics and sprawl. I like trains, but they are mostly unnecessary for the majority of trips if people live in locations reasonably near the places they go frequently. Madison is a great example of this - I don't really see the need for intra-city commuter rail. Regional rail - great!
My rating for the P.U.M.A: F+, for its fundamental design flaws and the general misunderstanding of 'the big picture' by its designers.