Caché (2005)
The acting is superb and the couple seem incredibly real. The lack of a musical score made it feel less like something staged and more like we were glimpsing actual reactions. Despite these precise choices in the look and feel of the film, the story left me frustrated. I was solving a mystery -- changing my mind about what I thought as bits were exposed. I mean, the whole movie appeared to be designed as a "whodunit and why." Without eventually providing solid answers to those questions, there's no longterm satisfaction.
Still, it's effective for every bit of the time spent watching. It's only in the aftermath that irritation sets in.
B