I read the comment posted on the sight and felt I had to give a counterbalance... I saw this film about two years ago on a basic VHS copy and was astonished. Yes of course you need to be prepared to deal with a long playing time, and a pace that may at first appear on the slow side, but BUT... ...Rivette pulls off an extraordinary coup in managing to ratchet up the sense of paranoia so intensely that, by about a third of the way through the film, you find yourself watching even the most innocent, apparently event-less scene with total rapt attention. Essentially taking core Hitchcockian suspense techniques and pushing them almost even further than that Master did, this has to be seen to be believed, in my opinion. Bonnaire is extraordinary; you become engrossed in just watching her thinking! The whole thing is a text book example of how to manipulate the viewer's mind to such an extent that they end up directing the film themselves... My only cavil might be the ending - I needed perhaps a touch more to be brought out onto the surface, but otherwise, (and certainly if you know Rivette's other work) open your mind and try it.
Review of Secret Defense
