When filmmakers attempt to do anything radical or completely experimental, critics often hit them hard with insults about how "unreal" or "amateur." But, hello, all of these new devices being used in films ARE unreal AND amateur because they're so innovational (since no one has tried them before). Tom Tykwer is exactly the sort of filmmaker that likes to take chances, who goes against the normal (sometimes recycled) cinematic techniques employed by the majority of the cinematic world. Here, in "Winter Sleepers," we see those revolutionary techniques that led to his international success in "Run Lola Run" in full bloom. The narrative is basically shallow, leaving many gaps in plot and dialogue, but this is done purposefully, and the filling of the gaps is left up to the cinematography, lighting, and color schemes. It is no surprise that Tykwer uses the subjective camera to convey the feelings of his characters (sometimes we fall to the ground in a flash of white when Laura blacks out, or we spin around in circles when Rene has a psychological episode). It is done for a purpose, and we can understand the turmoil that each goes through--without the reliance of a script.
The film can be seen as more character driven than plot. So, if you need the precious plot more than anything else, I wouldn't recommend this movie. But you should see this movie if you're at all interested in how an event can exponentially set off another set of events, continually building, until the life of every character (whether involved in the first event or not) changes forever.