I've watched all of Sherlock at least twice through, so how could I resist?
My reaction is to just shake my head in wonder. Which has been my response to the whole series. I will of course buy it and watch it again as soon as I can, but doubt very much that I will ever have even the illusion of having in my mind a clear sense of what constitutes the "actual" narrative of Sherlock. Not that I'll ever stop trying.