What an interesting film this is. I deliberately catch up with big movies and books years after release so it was the first time I'd seen it. I think a delay helps balance the gadgets and gimmicks better with the more subtle themes, and this seems like a film to benefit.
On the whole I enjoyed it. In terms of inspiration it's got lots to take away. The concept and accumulation of detail are impressive, exactly as we'd expect, although for me it's not as profound as it seems to want us to think it is and there's plenty that doesn't work, is too loose, oddly tired or silly, and all the obvious laughs felt somehow out of place.
It does still manage to surprise though, on many levels, and there's a feeling of a natural development despite the railroading, with plenty of observations to make and layers to peel back. I'm still thinking about the construction, the relationships of the characters, the painful ambiguity, especially of the ending, and the very human, honest approach.
Appropriately, given the water theme, it's the immersion in the world that really grabbed me, though more the subjective world or worlds of the central figures than what I saw as a rather uneven near future setting. It also has one of the best shots I can remember in a blockbuster, downstairs at the hotel, 10 to 15 perfectly realised seconds of cinema._