I didn't want to see this movie when it came out, but it crossed my path recently so I thought I would give it a go. My original instincts were correct.
There are serious credibility issues in this movie. Not that the Earth suddenly freezes over, baffle me with enough science and I will believe anything.
I do not find it credible that this stupid man walks to New York to save his son. Why? What did he think he would do when he got there? As it turned out his son had it sorted anyhow, and the father arguably killed his friend and work colleague so he could prove he wasn't the slack father his ex-wife thought he was. A rescue team would have flown to New York when it was all over anyway - he didn't need to walk there.
Bin this one.