Only played it on the PS3 so far, will try it on the PC too. It really has it's own unique feel stylistically and looks every bit as good as the screenshots suggested. The environments are suitably detailed conveying the dark, grimy atmosphere of the comic material. The group combat reminds me a bit of Urban Chaos, a little of Oni, but MUCH tighter, easier, incredibly visceral and very satisfying. Stealth take-downs have been well implemented and are necessary as Batman is very prone to swiss cheese impersonations in a matter of seconds.
All of Batman's movement is brilliantly captured and feels "right", adn oh that cape! He has the manoeuvrability of a ninja coupled with the stopping power of an artic lorry. Taking a goon out from above, leaving the sod hanging by his feet before swinging across the room to observe is executed fluidly with no complications. Observing his rightfully nervous mate (detective vision shows peoples BPM) stumble up to his friend while The Joker (Mark Hamhill) cackles away in a suitably omnipresent and creepy manner teasing the poor guy, "he's only a man, like you, in a bat suit!". The poor dude is put out of his misery when Batman silently glides across the room like a human stealth bomber, planting both boots into his face, a sickening crunch as his head cracks off a steaming pipe.
The demo doesn't really show off any of the puzzle elements of the game, and it's a bit short, however......I'd recommend playing it. The is very possibly "the" Batman game some of us have been waiting for.