I'm not a fan, and Dawn of Sorrow is a game that I would not recommend to someone else.
It pretty much bastardizes the characters of Aria of Sorrow. I have an emotional investment in those characters, so that's not something I'm going to turn the other cheek to. The atmosphere is way off, and that goes along with bastardizing the characters. The general anime trope-ish deal permeates the entire game. The graphics are actually not that nice to me. There are some stunning areas, but they are rare, and most of the graphics bleed laziness. The new sprites do not gel with the reused Symphony of the Night/Rondo of Blood sprites at all. The differences between the styles are actually pretty jarring. The Tactical Soul System is surprisingly worse, as it's become way too grind heavy. The music is mostly boring, empty jingles.
The good things are that the boss fights are really cool, the difficulty has been ramped up, and the extra game modes are way better than anything the series has had before in that area.