It's mind blowing. Definitely worth every second of time spent watching it. It has that Avengers: Infinity War feel to it at the end. Beautiful shot scenes, monsters more creepier and scarier than ever before, more intense action scenes. Loved the facts that they didn't really have to travel to the upside down again and that for this season, Will isn't so much in danger or in pain as the previous seasons and that Eleven is not the answer to everything. Also loved the Dustin-Erica duo. It was spot on #teamnerds. And the father-daughter relationship between Hopper and El which can only be described in one word: heartwarming.
Looking forward to S4.