Highlight: I liked the bit (not quite 40 minutes in) in which Willis drives a cop car over a fire hydrant and the resulting spritzer knocks a shooter out of a helicopter. Very nice. The car taking out the helicopter was okay; the airborne car in the tunnel felt derivative.
In fact, a _lot_ of this movie felt derivative. And misogynistic, at times.
Also, the cybersecurity chief was unbelievably useless. His idea of dealing with a breakin to his computers? Round up the usual suspects. And he _evacuated_ his HQ in response to an anthrax alarm (an _anthrax_ alarm? How could such a thing even exist?) going off, even tho he knew that air traffic control was down, Amtrak's control system was town, blah, blah, bleeping blah. Anthrax does not kill you quickly. Anthrax kills you _very very slowly_. (a) You could probably bet that if all those other computer systems were going down (and you knew your operation had been compromised recently), then that alarm is likely bogus. But more importantly, (b) if the entire freaking country is under multiple attack in your area of specialty, you suck it up and risk anthrax rather than abandon your post.
Do firefighters run out of a building when the smoke alarm goes off? No. They run _into_ the building. Geez.
On the bright side, this in no way detracts from the believability of the film; one could reasonably expect that emergency services under this administration would display this level of incompetence.
Unfortunately, while the film makes one toss off acknowledgment that in order to access some systems you would have to be physically on site, the film as a whole is predicated on a very small number of people compromising, like, _everything_ remotely. Also, the description of the power grid in the movie is so unbelievable that if you have any problem with incontinence from laughing too hard, you should probably go pee before you get to that part of the film (say, if you're pregnant, which is when I had problems of that nature).
I recognize that action movies are not supposed to be realistic, but I tend to take it a little personally when they get the computer stuff this far wrong.
On a final note, I suddenly realized that in addition to the more obvious similarities between romance novels and cheesy action flicks, they share a structural problem. Let's say you're reading a romance novel, er, erotica or whatever for "the good bits". Not that anyone actually does that (gosh no). But the "good bits" tend to actually only be good if the context has made them compelling: through good characterization, so you can relate to the people involved and can really believe they'd be doing what they are doing (to/with each other, in the way that they are doing it, etc.). Through reasonable plot development. Etc. Similarly, if you are watching an action flick for bits like the helicopter and the hydrant, you have to actually care somewhat about the people involved and have a backstory that makes you accept that what is happening is happening -- these people would do these things, etc.
This movie really failed on a lot of that. That's the real problem. I don't mind completely fictional computer systems if the story is there and working for me. And here, it just was not.
ETA: Unbelievable. Just unbelievable. Judging by googling, a shocking number of people out there actually think that this kind of attack is somehow possible. I don't even know what to do with this. Do they not realize how ancient and patched together and impossible to use most really important control systems really are? Even onsite with full access it's hard to get this stuff to do anything new and different. What a bunch of optimists.