I am watching this series since its first season but i never wrote a review because i thought i will write it after watching the forth season. And now i just finished it. It is one of the best series i ever seen. Everything is good with this series its plot, screenplay, acting, cinematography, etc. All are perfect. Season 1 is very well written and its so entertaining and season 1 remanined superior to season 2 and season 3. I will give 10/10 for season 1. Season 2 is also good it is my favourite season but not good as season 1 i will rate it 8.5/10. Season 3 is the least favorite season for me because the story of the season is bad but as a stranger things fan we all will like that season.while comparing with its predecessors it is bad and i will rate it 6/10. I had high expectations on season 4 and it is above my expectations it is one of the best season in the series. The plot was damn good and the acting and music everything is perfect in this season like season 1. But the duration of this season is very long it is so lagging in some times but we can adjust with it. Overall a very good season. It is ended with a cliffhanger that's so awesome i will rate this season 9/10. Overall this series is worth watch and don't miss this series.