The moment he shows up after that long monologue... perfection. Just that sudden drop of humor after cold and dreary 3 years. Makes you feel right at home with the usual pacing of the manga.
I'm not sure what I'm feeling. A bit unresolved I guess. There was no sudden turn of fate or anything. But I suppose looking at it realistically, it's as good of an ending as it could have been. They look happy, so I take it as a happy ending.
It's a bit weird saying goodbye to the series with so many questions still unanswered, but that's probably one of the unusual, yet positive features of this manga. It's not about figuring out all the mysteries of the world, it's just a story about a certain period in the life of a few people. And now that period has come to an end.