Good points first then:
Cgi was good, the actors were also good though the actor playing Botan didnt give off the Botan feeling, she was cute though. The horror version of yu yu hakusho I really liked and had the right sort of reality I'd expect to a yokai storyline. Very well executed in that respect.
Bad points: they messed up the story line. They cut out almost everything, and then smashed what was left together, to create a messy, rushed story that barely could be called Yu Yu Hakusho.
They should have stuck to the storyline, divided it up into seasons and not disappoint millions of fans with half-a work. So, a waste of time for die hard fans, but I suppose a good time if you are new to it.