Unfortunately, we didn't make it out there (though we are avid BART riders and are curious). But based on this 2-minute clip from BART, the whole world is pleased. Somehow, the transit agency managed to edit out the protesters that were out there, demanding BART change the current design. Specifically, it was BART passengers with disabilities who claim the new handhold poles in the entry ways of the new cars are impeding their ability to ride the trains.
In any event, here's a glimpse inside the new fleet: