I read the book before seeing the video; my wife had not. The movie was so confusing, I had to "pause" the playback half a dozen times to explain to her what was going on. The book's time changes were difficult enough to keep track of: in the movie they were incomprehensible.Too bad the locale was changed from the London suburbs to somewhere along the coast in the USA, necessitating an American cast, who are seldom as accomplished actors as their Brit counterparts. (And why does the heroine have a British accent???)
As usual, the book was better.