So Jigoku shojo or 'Hell Girl' as it's known in English, I found to be an enjoyable series. I'll admit that the first 10/15 episodes -so most of series 1- follow a shortly recognisable narrative. Someone is clearly being mistreated or hurt by another, so through the "hell communication" they write on the website the name of their tormentor, and the Hell Girl will take revenge for them. There are 2 series after this and they delve into the back story much more and we finally learn more about the Hell Girl -how she came to be- and her assistants.
Overall give it a chance it's worth a watch, the character of Hell Girl is one of my favourites out of all the anime series I've watched. I'd stick to watching it subbed- the dub isn't great. The animation is very lovely too.