The start was fabulous. Like most of the people I have my own complains about the ending. Though it wasn't the worst ending, it was still justified to some extend. I may sound contradictory but I don't want to give spoiler by writing my reasons here.

To give overall review.
Plot - something new - fresh. The chemistry between all the characters were awesome, beyond expectation. This is one of the drama, where you can enjoy all side characters, it didn't just not focus on leads.
There are many fun factors in the drama. Execution is quite well, except for the animations in some scenes. But I would overlook that issue considering they were making this series on air.
The ending episodes were little serious, if you watch it on one go - you might find it dragging. There were some open loops and some unnecessary scenes that didn't make any sense at all. Those were the only thing which I could not connect - tho it was all in last 2 episodes. Rest were actually nice.

I would recommend this to people who are willing to keep a open mind and are not just looking for romance.

Actors - I didn't liked female lead or I don't know it was her character or the actress herself. But sometimes she did annoy me. I loved all other actors to core.

Re-watch - Might watch some scenes but not as whole series.