Hated the ending. Straight away I must say I agree with most comments in the "I hated this movie" category. However, I am writing this review to point out what I think might have been some redeeming features of it until they were totally spoiled by the fantasy elements and the ridiculous ending.
Both my wife and myself were first attracted to it as it was classed as a drama on its TV showing (totally wrong, it should have been a fantasy/horror - there were certainly no thrills in it for us, we do sometimes quite like a good thriller - and then we wouldn't have bothered at all). We also thought the plot sounded plausible - a wealthy western couple losing their son in a tsunami, and then the seriously disturbed mother persuading dad to go with her look for him.
On watching the film, we thought it went well along these lines, with the boy apparently being spotted on a video of children playing on a river bank, with one of them wearing a red shirt - possible the Manchester United shirt their son was wearing when he was washed away. This video was seen in a screening amongst wealthy patrons of charities organizing relief for the tsunami victims, also very plausible.
So off they go, with some very good shots of the scenery and local means of transport, etc. Unfortunately much of it was at night-time, so we saw little of it. Why do film makers do this, or is it the reproduction on a TV screen? Anyway, that was the first put-off for us. Another put-off was the interminable length of many scenes, where nothing else happened (e.g. when the husband rescues his wife from the sea and they were splashing around in the water for far too long) and we were trying to be patient whilst waiting for the scene to change.
As events unfolded, and I will not say more to avoid further possible spoilers, the only other redeeming quality for us was the chance that they might find their son, and we watched it through to the end with this hope in mind.
I must add one major criticism of the use of the children in the film, on top of everything that has been said in other reviews. Were the film- makers trying to emulate "Lord of the Flies"? I can understand how boys of rich parents in an English prep school can turn into little savages, but the local children in such a disaster, having lost their parents, would not gang up in the forest like this. I think it was very degrading of the people who live in these areas to suggest they would.
Googling child abandonment in Burma does not change my view of this film. This child abandonment is due entirely to the military, of which there is no mention. If there had been, and cut out the fantasy, then it would have been far more successful as a drama, albeit fictional.