I can say one thing: It's okay, but it's still meh. All these breakups, timeskips and reunions with the words "Hi, I still haven't forgotten you" are getting on my nerves.
What's the problem with making it like Horimiya?! I demand that all romance manga end with the words "And they lived happily ever after", otherwise, what's the point?
You read 200 chapters, follow the development of the relationship, and then lick my balls instead of the climax. You wanted the whole thing to end with something memorable? Or maybe instead you want a half-open half-good ending?
But my frustration aside, it's a good ending. At least a fitting one. It was led to this for dozens of chapters, there was a dialog, and it ended on such a powerful phrase too. Not bad in general, it could have been worse, but if Kotoyama is going to draw another manga in the romance genre, I probably won't read it.