The show tells you within the first few episodes how it's gonna end, and it does nothing to reduce that impact. The only anime to date that's managed to make me cry. This story is an amazing tragedy, and one that I still think about years later. It's utterly heart wrenching, and just as beautiful a story.
The visuals are definitely a little dated, but for what it is it's acceptable. Sound is the same way. The characters have some room for improvement in general, but they're still well written.
This IS a tragedy so my metric of enjoyment is kinda based on how much it hurts, and the ending was one of the most knife twisting moments I've seen in an anime. Even though you see it coming from the very beginning, it's still nothing short of incredible.
One of my all time favorites.