This is one of the best drama/love triangle games (pieces of media even) I ever saw, even if it does have a bit of soap opera feel at times. It deals with adolescents making less then stellar decisions, belonging, estrangement and feelings of guilt.
I played this game alone with the fan patch. One challenge is that it has a huge playtime. The other one is that H-scenes -which I personally did not really care for- are unskippable the first time. The absolute star of this VN (whether you like or hate her) is Setsuna, whose character is explored in all routes, developing her further and making her seem almost real.
It has a fantastic soundtrack, I suspect this is one of the reasons why it's difficult to re-lease / remaster it, because of rights issues.
It's fantastic and tugs at your heartstrings.
It would be a travesty if this story would be lost to the ages.