I haven't watched the Taiwan and Korean versions and I probably wouldn't but I have watched the Chinese version. I must say the Thai version was a more light hearted version, the Chinese version was much more angsty. I enjoyed both versions and I liked that there were some differences in the story so it didn't feel like I was watching the exact same story. Random comment... Found the male lead's laugh very weird ? and call me shallow but I wish he was just a bit taller.
I was pleasantly surprised by
1. Prawut was far less "douchebaggy"? than the Chinese ML or even compared to most MLs in the lakorns I have watched so far. In fact, I felt sorry for him suffering during period of estrangement with the FL (the ML in Chinese version totally deserved it ?).... though I realise the time was important for character growth of the FL.
2. No horrible, deranged and obsessed second FL (a first for lakorns, at least those that I have watched)
3. Handsome very likable SML.
4. Light hearted, just right number of episodes that I don't feel guilty about "wasting" my life watching dramas ?
What I felt could have been better?
1. I wish there were more interactions/ scenes together) between the leads showing them falling in love... It was a bit difficult to believe when the ML went from "Kae is my love" to "I love Nid very much". for that matter, even the FL's feelings weren't that clear to me... That she "loved" the ML. I felt her attitude was that of a usual Asian ( don't come at me ?, I am Asian myself) girl forced by circumstances, trying to make the best of a situation, ready to work at making her marriage a success even if she wasn't in love with the guy and disappointed when he clearly didn't think the same way ?
2. The ending was a bit abrupt. Would have been nice to have scenes after they got back together.

Final verdict: nice, totally watchable... One might be more appreciative of this version of one has watched the Chinese version.