Days had its moments, and overall it was fairly enjoyable, but it's not up to par with the other games in the series in my opinion. I feel like the story could have been told in a better format, and I'm still disappointed that we didn't find out all that much about Organization members other than Roxas, Axel, and Xion (well, we got a little bit of Saix, Xigbar, and Xemnas, but not as much as I was expecting/hoping). The story had a lot of heart, though (no pun intended), and Roxas is my favorite character, so playing as him again was enjoyable.
Yeah, I'm rambling now, but you get the point. :P