I am only writing this due to the extremely poor review given by the community reviewer Vivafruit.
Judging from the review that the person gave it appears they didnt watch the entire series and rather just watched a few episodes and gave up.
Whilst it is true for the first 6-7 episodes seem to be the same old story over and over ( which still are entertaining ) it picks up on a more solid story after this which is very entertaining and requires a lot of thought on the actual story.
Jigoku Shoujo is a brilliant anime with excellent music and brilliant character development even though some characters are only for one episode. Some stills are used a few times in a few episodes but apart from that the animation and quality is brilliant.
Give this anime a chance and you will not regret it.