Romney was clearly playing safe and trying to reassure moderate and right wing voters about his foreign policy, although this was quite different from his positions during the primary when he had a different target audience. It does sort of confirm he will say anything if convenient.
Romney's best bit, where he sounded most convincing, was when describing how he would get tough with China on jobs, patents, currency valuation, etc, although he gave no clues as to how he would do these things.
The most disturbing bit was his talk about Iran. He seems to want to go for the go-alone tough sanctions that have been so successful in overthrowing the Castro regime, rather than the diplomatic route that have got tough sanctions against Iran. How he thinks he will get Chinese and Russian support at the UN when he is publicly making them enemies was left unexplained.
Best Obama line: "You mentioned the navy, for example, and that we have fewer ships than we did in 1917. Well, governor, we also have fewer horses and bayonets, because the nature of our military's changed. We have these things called aircraft carriers, where planes land on them. We have these ships that go underwater, nuclear submarines".