For the most part, it sucks. The story sometimes may head towards the direction of the main bad guy.
-The main bad guy is pratically a re-skinned naraku.
-The pearls are super important, but they ignore them after a battle and not look for them???
-Yes i said pearls, you now have shikon replacement....might as well be shikon jewel babys.
-You get an annoying replacement shippo.
-All three girls are apparently at end of story inuyasha's level already, including the one that just barely started fighting demons.
-You get to see the original inuyasha characters, mostly in backstory fillers. Thats probably as interesting as it will get.
-Rin was super underage right?