Ending ruined it!! Started of great and was good for first few volumes but then seemed to get progressively worse then it just ends abruptly which is a shame.
It's ends abruptly, it's like half way through an arc and then all of as sudden it ends, no final epic fight scene against the final boss and its like oh... such and such also joined the harem without any build up. Cannot remember all harem members but there is quite by the end of it.