I really really really loved the show and I think episodes 6 and 7 were probably the strongest points as far as drama and exciting stuff happening. The atmosphere in this was absolutely incredible, the sound track was so incredibly on point it blew my mind every time, and the acting was really good considering how inexperienced so much of the cast was. The CGI on the monster could have used a lot of work or maybe just a guy in a rubber suit would have been better though.
However the final episode was kind of a mixed bag, the spliced in background of the chief's daughter and the sudden "11 has to disappear to kill the monster" was just kind of, not ass pully but close to it especially given how the only real reason for those things to happen are.. well i don't really know why, the chief is clearly already invested enough into this whole situation so why does he need to have additional drama behind his motivations? 11 could have just as easily passed out for a few hours and lost her powers forever instead of making her vanish (because she's so painfully obviously not dead), it would have been nice to get a scene of her and will waking up in the hospital together and both of them recognizing each other and him whispering or mouthing a "thank you" to her or something. We could have then gotten the shot of will being swarmed by his friends and 11 just laying there alone until the gang brings her into the group hug.
The show would have closed out with all of its loose ends tied up and everyone just kind of going back to routine. Instead we got a ton of "BUT THERE COULD BE A PART 2" hints that were so painfully sign posted that it kind of sucked a lot of the weight out of the resolution. Will having PTSD flashbacks and barfing up some of the monster was weirdly placed though I felt like the show implied will was special a few times (monster was drawn to him with no blood shed, mike commented on will using the fireball spell as if he knew something was up and i think there was one more example), however making Will into something special feels really unnecessary. I feel like the show could have really benefited from 1 more episode or something to really round things out.
We got some good info about things surrounding the lab like what they did with 11, how little they understood about anything they were working on, 11's backstory and enough hints about what the upside down was to kind of form our own opinion on it. But considering the PTSD thing at the end and that Will pukes up monster bits a month later it just seems like the show was trying to toe the line between being mysterious and ambiguous enough for the viewers to form their own opinions and explaining enough so we knew what was going on but kind of stayed too far on the mystery sides. We know enough but it left us with so many questions that the answer can only really be "wait for the second season". Hell the show barely even gave us much insight on the people who ran the place which made them really weak antagonists other than "yeah they're kind of dicks". The real antagonists felt like all the people who wouldn't believe them lol.
But I would still 100% recommend this, and honestly I think I'm gonna binge watch it again this weekend.