Saw this today, finally, after some friends recommended seeing it on the big screen. We had seen the immediate preceding film when it came out, though I think I've missed some of the franchise.
It was OK. Just OK.
It had the traditional MI over-the-top action sequences; unfortunately some of them are so over the top I was actively having to tell my brain to stop analyzing and just let it go, because I was getting jarred out of suspension of disbelief.
Plus I found the editing in the first 2/3ds of the movie to be very difficult to follow, between quick cuts, jumps between sequences with no continuity, and the annoying technique of trying to give exposition via two parts of the story and two sets of characters simultaneously. Thirty minutes in I was wishing we'd picked the new "How to Train Your Dragon" instead. It improved later.
I might have enjoyed it more had I remembered some of the characters and could bask in the nostalgia ... but on the other hand a film shouldn't require member-berries for buy in.
6/10