The characters, acting, visuals and sound were absolutely top notch. From what I could tell it opted for 'physical things' rather than CGI a lot of the time and that really paid dividends. Where CGI / specifically effects were used, as it was for the lead's holographic partner, or the glitching Elvis - which were fantastic.
The plot was also excellent although the first scene was very predictable. I became very intrigued when the suitcase was opened and was then impressed with both the first twist and the subsequent reversal of that twist.
The were a few niggles for me which I'm not letting spoil my enjoyment:
The 'prostitutes' were told to speak to the 'man in the green jacket' - wut!! Green?! Hmm greenish dark blue maybe but that was anything but a 'green' jacket
The DNA sequencing scene was lol - perhaps it wasn't in 'real time' but he really didn't look at much DNA to decide that two individuals were identical!
More seriously, I didn't understand why they didn't kill K after they captured Decard, and I didn't understand why they put Decard in a car and drove him somewhere (i.e. leading up to the ocean battle). Perhaps some lines of dialogue got cut out to explain this? They really should have expressly explained those points. Anyone can feel free to explain to me
The biggest drawback for most people was it's duration - 2 hours 45ish is really long for a relatively slow film with long scenes without dialogue. Despite me typically taking marks off for films that are too long, it wasn't much of a problem for me, although I expected it would end several times before it actually did. Some people coming out of the cinema immediately complained at its length. Personally, I thought it could have ended shortly after Decard got taken away, with a little bit of editing to tidy up loose ends, but it went on for perhaps half an hour more than that and I actually started to wonder at that point just how long I'd been in the cinema.