From episode 1 to 15 it was good.
I really like the Emperor×Maid body swap part. Both Bai Lu and Zhang Yi Jie portray their roles perfectly. I really like Zhang Yi Jie's expression when he portray Da Xi's character.
The whole 15 episode were fun with some little twist and silly logic, which didn't really bother me.

But from the moment Da Xi and Ji Man got back to their body. Then the whole Western Goddess Tribe appear from nowhere. It's just a mess. Looks like they tried to make a plot twist, but it's doesn't goes really well.
The ending? It doesn't feel like an ending actually, it looks like the start of a whole another drama.
I'll just pretend everything ended happily after Da Xi and Ji Man goes back to their bodies.

The Couple skit at the end of every episode is really cute. It's like portraying Da Xi and Ji Man in modern life.

Overall it's a decent drama
I really like the intro & outro song. The cinematography was pretty good.
But because of the messy ending, i wouldn't recommend this to anyone.