The hydrogen powerplant sounds inordinately complex, but it's a proven technology that is so reliable that NASA has been using it to power spacecraft for the past 50 years (albeit using an older alkaline fuel cell, which ran hotter). Fueling, at any one of dozens of stations already in place in California, takes no more than five minutes, and the process is nearly identical to current gasoline and diesel refueling procedures. In fact, it's easy enough that your grandmother could do it after basic instruction.