There is no denying this is a very interesting film, both in terms of content and presentation. I really enjoyed it and was fascinated by some of the ideas and theories discussed.
However, there are a few things you should know before watching this film.
Firstly, not all the facts are correct, though these are usually minor points (like the statement that humans are 90% water - it's closer to 60% for an adult).
Secondly, Not all theories and experiments described are explained fully - they are sometimes "edited" accounts that better fit the film, but are not entirely accurate.
Lastly, and possibly most important is the fact that this film was made by followers of Ramtha, and religion/cult following a 35,000 year old Lemurian warrior who is channelled through a woman called JZ Night (She is featured in the film).
There is wide speculation that this film may be "propoganda" for their faith.
I'm not suggesting that there's anything sinister at work, and the film is definately worth watching, but I think it's important to know who it is presenting these ideas, as the movie itself doesn't make it clear.