This is really one of my favourites. You should know that I don't really read many mangas. I often start some and soon lose interest in them. But with this one it was different. I couldn't stop reading and it drove me crazy to have to wait months, yea even years to finally read the ending today. It's hard not to spoiler on this one, but I'll try.
The characters are awesome, they could be real. All of the story could be real. That's probably the reason I like that manga so much.
The one thing bugging me a little is that the protagonist couldn't decide on what she wants and that the guy she likes couldn't really make good decisions either.
BUT the worst thing: I couldn't stop crying. I was constantly crying. Sometimes because things were cute, in the end especially because they were sad.
The ending is a little bit unsatisfying, but it could have been worse.
All in all I really do recommend reading this manga! It was gorgeous! I am sure I will read it again one day (if I can bear all the crying :D).