I was looking forward to watching this with my 20 year-old son, as we both find the book of Revelation particularly inspiring, and hoped this film would convey and maybe clarify the complex drama of the original - but were very much disappointed, and even bored, by the vast majority of this long film which concentrated more on the lives of a semi-fictional group of persecuted early Christians than on the actual revelation which John received. I found the scene where the Christian prisoners were suddenly unchained and released because of the death of the tyrant Domitian particularly unconvincing!
The actual dramatisation of John's visions made up (I would guess) less than a quarter of the film's length, and was very disconnected and hard to follow, especially for anyone who did not know the book of Revelation. The final scenes of Heaven were beautiful enough, but there was an almost total omission of the real drama preceding the closing chapters - nothing about the overthrow of Satan (which surely could have made great cinema!) or fall of Babylon.
To summarise, I would not recommend this film to either a committed Christian, or to anyone who is hoping for an inspiring film version of a book which has such vast potential for cinema!