I've watched the anime and read the manga multiple times and I'm SO satisfied with this. It's almost perfect. The rhythm, the acting... just wow! Beautiful adaptation.
That said, I just can't be unbiased, cause any flaw the story might have I've already expected. So for me this grade is unbelievably low. As an adaptation it deserves at least 9 or 10.
If you enjoyed the anime or the manga, you'll most likely love this. It's not cringey nor shallow as the movie (I wrote a terrible review for it, but for comparison purposes, the phrase that summarizes it the most is "I would've rather just rewatched the anime, I feel like I wasted remembering the story on something so below in quality.").