Your mileage may vary here, especially for Nasuverse fans. While the writing is impeccable and the dialogue and interplay between characters is very fun to read, battles are another story. Much of it seems to be lauding how awesome Ichigo is and shunts the FSN characters off to a level where they are beneath most bleach characters. This means that Ichigo's main friends (not the normal shinigami) will be able to match servants.
The battles, while executed well, are extremely discriminate towards the Nasuverse characters. Almost all of the Bleach characters win, no matter how unlikely it is. Several mechanics of the Nasuverse are ignored in their entirety, while others are badly skewed so that the Bleach characters come out on top. This is less of a Fix Fic
and more of a "Look how awesome Ichigo is" fic.