I've never been a rambo fan. I never quite 'got' it.
Then i heard a rumour that an aged stallone was going to make a finale, and had to check in.
The trailer was brilliant, and cemented it for me.
As has been said many a time, there's no story here. But what there is, is near non stop action and gore. It's one of the most violently bloody 'war' films i think i ever have seen, and it's brilliant for it.
So much so that you even forgive the poor editing and direction. And even let them slide on the numerous under-cranked scenes (specially toward the end) which were either done to make it appear more 'action-full', or to get everything in to a time slot.
If you like a good bit of violence and find it impossible not to laugh and gape at people being turned comically into jam, then you can't go wrong.