Story's okay, but the direction is lack-lustre, kind of like the opening of The World Is Not Enough, where all the cuts come about two seconds too late. Abrams seems to be too in love with his shots to cut early enough to keep momentum going.
Plus some really silly stuff: one female spy's starts taking secret pics of villain Philip Seymour Hoffman and they've added in little flashes as her camera goes off - which NO ONE else seems to notice. Full of silly stuff like that.
Yet again, a M:I film fails to live up to the original series...