YES. WATCH IT!

One aspect that makes Hospital Playlist the best music-related/slice of life/medical k-drama?
The best in music-related drama: Besides its interesting topic: medical drama, it has what other dramas don’t: THE REAL MUSIC PERFORMANCE. The actors/actresses really play those instruments after countless days of practice. IT IS NOT EVEN A MUSIC-FOCUSED DRAMA. Mention me a music-focused drama, I'm pretty sure it isn't better than this drama in terms of real musical performance.

The best in slice of life drama: Everything looks so natural that it feels like we are watching real-life scenery. The romance aspects don't make me cringe.

The best in medical drama: As you know, Hospital Playlist is a nearly-perfectly-researched medical drama. Real doctors have been involved in writing the story and you can know it by watching doctors' reactions to this drama on YouTube.

Pros (I wrote only what season 1 doesn't have):
- Unlike its 1st season, the romance aspect of this season is much stronger.
- The comedy-among-friends are still there and are not going weaker.
- Amazing side-characters development, like Gyeoul and her family, Chuchu and hers, Jaehak and his, and many more. But, Jung Rosa-nim is my favorite!
- Characters' consistency! i.e Songhwa is still being Songhwa in this season xD

Cons:
- Unlike the 1st season that had no plot hole, there’s a notable plot hole in this season. It doesn’t affect the whole plot, but it indeed gives a big minus point.
- Plot cutting. I think the plots aren't over. There are still ongoing plots that must be done. Sooooo, I hope there will be season 3.