OK, it might sound dumb, but I really liked this anime. Even if I confiss there are a lot of moments that the anime do weird things (like the fact Jintan been trying to prove the existence of Menma for like many episodes even if she could get things and hold them) the anime was amazingly worth it for me.
I don't lie when I say that I am too much of a sentimental guy, so I guess this was a very nice anime for me, the thing about the feels and ''not getting over someone'' is awesome, just because I could thing that maybe that'd happen with me, who knows?
The characters are not the most original, but I don't think anyone in the world is fully original, some stuff like Anaru being influenciable and be constantly tryna find her place is really relatable to a big part of teenagers nowadays, the pain of Menma's mom and Menma's brother for the fact their parents never got over her is also pretty moving.
That's my humble opnion, i hope you feel the same when watching Ano Hi MIta Hana no Namae wo Bokutachi wa Mada Shiranai as me!