First of all when we rented this movie, we did not know it was in Swedish and that we would have to use subtitles. Not happy about that. Being a diving instructor, I winced continually when the blonde sister kept making dive mistakes and her annoying personality was difficult to watch. I absolutely HATED when she killed a dog - that was a stupid part of the film which did not need to be in it. It was interesting for the scenery and I was hoping for the underwater scenery but the accident happened quickly. I thought the calm of the brunette who was down below running out of air was too fake. All in all, not a great movie - I would not recommend it.