After completing this drama series, i really can't understand any of the destructive comments...
It is really a funny, loveable, psychological intelligent written story, acts are amazing, i give it only a 9,5 because it can't reach the extraordinary greatness of a full ten like other brilliant series.

I will do quickly a pro and con, and also the reasons i think, which leads to other people don't liking this drama. (and i want to apologize - my english is not the best, but i have to give it a try for this series!)

The reasons why other people may dont like 7th Grade Civil Servant:

* Main Actress Kim Min Seo is (also for me) not the prettiest actress. At first i was kinda surprised she would play the main actress, because... of her face (i am sorry, but its true that this is selfishly important on love romance shows). Didn't hit my taste/sympathy ... and i am one of many - according to comments here...
BUT i am someone, who gives everything a chance. And she is indeed sweet and also a great actress, i love her now! You will come to like her a lot, if you only give her a chance to catch your sympathy. Also her character is indeed not 100% perfect (thats realistic ;P), but loveable, manlike and .. yeah, i like her and her actions are understandable ;)

* Expectation from an "Agent"-Series
Many people complained about the lack of agent style in this series - but seriously, this is nothing like James Bond, Fringe or Alias - it stands alone with his own level of "being agents". It has a lot of agents elements added, but - of course - not so much "action" scenes. I think, people who are watching this series because of the expectation of great action scenes, will actually fail. I prefer the meaning, "how is life being an agent", other complications of being an agent (for example: within a partnership) and so on to action. (For example: You don't compare "Gravity" or "Star Trek", altough they are "movies about the universe", they have their own severity fitting the special atmosphere/storyline, which is intended to create [for the audience])

* Skip Seo Won's parents scenes, don't lower your excitement watching them ... - and then you don't have to complain about any boring moments in the show! ;)

Pro:

+ Wonderful, heartwarming chemistry and love story between the main chars
+ The humour is exactly my taste - a little bit insane/crazy (hits my beloved korean nature :D)
+ Psychological realistic (nothing is overdosed or too "typical movie", more to comment would be a spoiler i guess - but thats very important for me to be so)
+ There were a lot of scenes i had to immediately rewatch, because they were so good, loughed and cried, etc.
+ For me it was exciting until the very end - didn't onhold the series (which happens a lot other times :'))
+ Characters are all really unique and after series has ended, i am now so sad that i cant see "all" of them anymore, because i enjoyed the time with them really much.
+ The music gets a lot better until it is catchy and rememberable
+ No disturbing side stories, focus on main story - sth. i appreciate.

Con:

- Again: As it has already been said in former comments: you have to skip the 1-2 Minutes scenes with Seo Won's parents.... Alltough Kim Mi Kyung is one of my favourite actors, i really had to skip them (you won't miss any information regarding to the main story, so i would recommend to skip it, if you are not interested in being a farmer ;P)
- For me the "agent story" somehow starts "in the middle of" and lacks a little bit of deepness. After a while it gets better, but this is to mention as negative.