Yeah it's nice, though the anime series was good to me when i first saw it back in the days. But how far did you read the visual novel?
If i may ask. I myself need to read the 5th hou ch game.
Just finished the 1st chapter, went through all hints and got the unlocked extra! Even though there is no voice acting at all, the ominous environment, the creepy atmosphere, the fishy characters is a piece of work, those... EYES *_* and eerie music, hits a spot. Especially during early morning hours, with lights off. Nothing as creepy as little girls and no mistake; devil and charon even united, would stand no chance.
I expect other chapters to have some choices, maybe? Like other visual novels do? But even if they don't, it's okay. That thing's a gem.
If only GOG brought us: Fate Stay Night and Phantom of Inferno, i would be set up for (gamer's) life!