I was sufficiently entertained so I would feel bad for giving it less than 8 stars, however the story is pretty bad at times. As a romantic comedy it's pretty great really, even the second pair has a good chemistry. There was no real love triangle, which I always appreciate. The actors were great for the most part too. Personally I didn't mind the casting changes, if I look at the entire series as a whole (with the novel as the basis) perhaps the ML in the second series was more fitting for the role. With My Amazing Boyfriend 1 the chinese wanted to copy the success of My Love from the Star and they've picked a lead that's extremely similar to Kim Soohyon both in looks and mannerisms & I don't think that would have worked for the story in the second season. I prefer Janice Wu over Yu Esther for the female lead role, but thanks to the long time between the two shows the change did not bother me too much. For a replacement Yu Esther was quite outstanding.
I hated how the first show has ended & I'm grateful that they've given me a satisfying conclusion, at last.

So I mentioned above that I had problems with the story. First and foremost the show is really long, the 38 episodes translate into the length of a 19 episodes long kdrama, which I'm normally fine with, but there was a lot of time wasted with the (really stupid, a normal person would have seen it from a mile away) child kidnapping plot, followed by a second kidnapping plot, so yep that wasn't great. Tian Jing Zhi's character is also written in a weird, inconsistent way. In the first show she practically threw herself at Xue Ling Qiao, but in the second show even after they've gotten engaged the woman decided to practice abstinence for quite a whole for ehm reasons and once all the major troubles were resolved she decided to develop a marriage phobia, I mean come on webnovel writer you could have done better..