I just finished watching this movie - new to DVD and largely overlooked in the cinema.
Hugely enjoyable - I would put it as the best new movie I have seen this year (I haven't seen 'Departed' yet).
Christopher Nolan - here paired with his brother Jonathan - is a gem of a screen writer and a very good director too.
Try to see this one without knowing too much about it and, if you like it as much as I did - which is a lot - then visit Nolan's excellent back catalogue, especially 'Memento' and 'Insomnia'.
He did 'Batman Begins' too, of course, but I thought that wasn't quite as good as it looked, if you know what I mean.
Anyway, see 'The Prestige' and enjoy.