First of all, keep in mind that i have no watched the original version.
I randomly started this drama not knowing at all what to expect, and even after finishing it, i am still not sure how i feel about it. I like the actors a lot, I think it is probably the best thing about the drama, also, I've seen some people not liking the choice of song for the time travel but i personnaly really enjoyed it, it felt very nostalgic.
However, as the drama goes by, I started to have many many questions which ended up not being answered at all. The main idea is good, but the issue with time travel plots, are any supernatural plot, is that is has to be perfectly logical, which was not the case here.
I also had trouble getting into the drama at first, then throughout most episodes I was invested, until the last 2-3 episodes which honestly, i have scarcely watched, skipping some scenes just so I can get to the actual ending. How could it feel so rushed but so boring at the same time? Honestly I have no idea, but it really negatively impacted my opinion on this drama, even though as I said earlier, I got really invested in it at some point.

Overall, is it worthed watching? Perhaps for the actors, or if you're able to turn off your brain and pretend that there are no plot holes and that everything is perfectly coherent.