Well, I finished it a while ago, and I am gonna tell you, your are not gonna stop crying in the second last episode, I cried a lot (and I am a pretty hard hearted man, I didn't cry even when Itachi died in Naruto)
Yes! I've been watching it for years, I can still remember Koro sensei. I thought Koro sensei wouldn't die and just live peacefully somewhere but sadly it's a better-sweet for his students and the watchers.