Well for me, it was great but waned a little towards the end. I was totally engrossed as K's story slowly went along. Uncovering a secret which could change everything in human / replicant relations. No real allies other than his Joi, could he actually be far more important than just another 'skinjob'.
I think the only problem was that the film played out so slowly that by the time they needed to start wrapping it up, it was too rushed.
And if the one eyed woman wanted Deckard killed, why not just blow the cars up rather than send K who had vested interest.
Would also have liked to see Jared Leto killed rather than just 'Luv'