My user experience with Kodi's plugins was not good. It kept finding subtitles for the wrong episode, or even worse the wrong show. And once I found a decent one I had to manually time sync them almost every time.

The thing is I didn't have a lot of trouble manually finding the right subtitles in any popular website, it would be different (i.e. not Kodi's fault) if the data was wrong or difficult to find on the first place.

I'll give this a try and see if it performs better.