I watched this show on the weekend for the first time, courtesy of Foxtel Box Office..
I also hadn't seen the original, or read the book.
I enjoyed the movie, the sounds and music were great, and the movie did have a real "thriller" feel to it, without being overly "scary". My wife didn't really enjoy it, she commented that she was tensed up through the whole thing.

Although she said the same about MI3 and the non-stop action.
Having not read the book, I was a bit perplexed about the ending as there wasn't a lot of explanation.. was it Earth's biology, little organisms etc, that brought the machines to an end? How and why?
And why did the aliens wait thousands/millions of years after burying the robots, before bringing them out of the ground? If they wanted Earth's resources, why couldn't they do it back then, instead of waiting until humans occupied the Earth and having an excuse to cut loose with the mega-death-ray?!
I also wanted to know how the son made it to Boston.. maybe Tom and his daughter should have followed him.. he got there before them.
Anyway, I did enjoy it but it's not something I'd write a rave review about.