I loved this drama to death! What made this drama for me was the amazing chemistry between Kang Ji Hwan and Park Si Yeon . It was was sizzling! It's been years and I still think about it and I find myself always comparing chemistry to theirs when I'm watching a drama. Also, their characters were incredible. especially Park Si Yeon's. Eun Young is one of the most interesting female character I've even seen. She's funny and smart and I've never seen a character quite like her in another korean drama. Jin Soo's is also just as funny and interesting. Both actors made their character came alive. That being said, it has flaws. The plot had holes in it, especially when it came to the time jump torward the middle of the drama. Also, Eun Young's acting wasn't bad but felt a little flat at times. However, I still give this drama a 10/10 because it's strengths outweigh its weaknesses in my opinion.