I've been somewhat skimming through Stranger Things on Netflix streaming. The show as presented seems too slow to me. I don't care about some of the characters, and the 80's E.T./The Goonies feel seems cheesy to me. However, the story is interesting enough that I want to see where it is going.
The show has a similar feel to "The X-files", which I tried to watch years ago, but I concluded that the show was going nowhere fast. The producers of "The X-Files" later admitted that their goal was to keep the audience in the dark for as long as possible.
Since the main characters are like 12-year-old boys, which gives the show its cuteness, it wouldn't take many seasons for these kids to lose their cuteness.