The storyline was somewhat typical: Daughters accidently exchanged after birth, daughters returning to their rightfully family (rich vs poor) and "brother and sister" falling in love.
Even though it was typical, it was still interesting. This drama is really about following their heart vs doing the "right" thing. The "siblings" had a great bond which made me wish for more happy memories between them.
Also, the ending seemed kind of rushed. Suddenly everything escalated and was then left kind of open, too...