Yuu Yuu Hakusho.
The creator from HxH is also the the creator from this series.
Therefore, you know or at least you could have a major idea of what to expect from this series.
Yu Yu Hakusho has a good story overall.
The typical Shounen Tournament Arc (They might have invented that since this manga is over 30 years old)
Yusuke Urameshi is one the most easily recognized Shounen MC, the guy has a rather unique personality, adding that a very good supporting cast in other memorable characters.
Now regarding the ending of the manga.
I believe (Also a lot of people or maybe the vast majority of the fans agree) it was better depicted in the Anime.
Nevertheless, is a story that you can enjoy.
If you like or you are a fan of Shounen Action Supernatural oriented series and you would like to look for a classic for the completionist score, you should give this one a try.