To put simply, Brotherhood and Friendship goes a few layers deeper in this sport than any other that I have known. What it is to face the elements of technical diving, especially underwater cave diving, is beyond lot of normal dwelling people's imagination and that is captured well in this simplistic documentary. It is a horrible experience to all involved and of course, great losses to the victims' families and their circle of friends. But these guys, despite the odds, went about their way of honouring what it all meant for them and for that it truly is a great tribute.
If you ask me, it has given me a bit of inspiration that someday I will become a technical diver and be good at it. There is this crazy in-explainable thing about it. Expedition, exploration of uncharted territory is what one will see from outside but inside the minds of these courageous professionals it's different world. Psychologically, the peace of mind, calmness and stillness achieved to be able to successfully carry out such dives and recovery operation is testament to some of the best and most valuable qualities of human being.
There are no frills and no bells and whistles. Go in with open mind and keep your calm. This is probably one of the best documentaries I have watched in long time.