The drama was actually pretty fun in my opinion. Yes, it being a CDRAMA meant that there was a lot of filler scenes and unnecessary dialogue. Nonetheless, I really liked it.
The FL and ML had good chemistry and even though it was a "fake marriage" they were able to make it look so realistic. In other dramas I've seen that utilized the Contract Marriage trope the couples always found it difficult to hold hands, give smooches or just be in each others presence. This was the opposite in this drama. The leads hugged, they communicated and they actually started to fall in love while married.
The only thing I really hated was just how the antagonist and the FL boss was always there causing problems. Like obvi, that's the antagonists duty but it got highly frustrating at times.
The ending was also MID. The ending was what made me rate it so low too.

Give it a watch though and don't just take people's opinion for yourself.