The Good: Great characters, and plenty of time given to them.
A really solid plot, doing very well to ease into the supernatural aspects of the story.
A mystery that not only works in how the story is presented, but you can and are asked to figure out the villain yourself, and the game doesn't hold your hand for it (though the likelyhood of being spoiled is extremely high).
Excellent drama and emotional punch coming into the games finale (something which I've not had enough of in games recently).
Some great music.
Solid combat mechanics and interesting twists on classic JRPG combat.
Good to great voice acting.
Naoto Shirogane.
Aside from the mystery itself, one of the most enjoyable things about the story was the way that when the game wasn't focused on the serious aspect of the plot, it was very good at setting a tone of just . . . nice, I guess. Especially in the last month you get after the main plot is over. Almost a slice-of-life feel, but with a bit more going to allow it the emotional connections and heart that really makes it a story. The best way I can think to describe it is slice-of-life, but with an actual story. (I feel like drawing at least a minor comparison to Miss Kobayashi's Dragon Maid on this respect).
The Bad: Voice acting is sparse (probably because it's a mobile port)
A few of the boss battles felt like prolonged slugfests, which is dissapointing after a few bosses that have interesting twists or strategies.
Most of the normal music (meaning not boss fights or specific scenes) are "merely" middling to good.
Felt pressured to romance Rise (not she's bad, but she wouldn't have been my first pick if I had to pick).
Questions about the supernatural elements of the story remain unaswered (at least in the normal good ending, I have the impression it's different for the true ending).
The other bad: I was spoiled for who the villain was (sort of, I knew they were bad, but that made it easy to peg them as the villain), so an aspect of the mystery was ruined for me.
The Vita is my father's, so I won't have time to do a more thorough run of the game and get the true ending.
Now I want to play Persona 3, 5, and Arena, but I probably won't for a few years.
SPOILERS (I guess that means just Xicon? At least we can talk about something we both like now)
Adachi was a surprise, even though, as I said, I was spoiled as to his evil nature, but not the . . . degree to which he was. While his boss fight was a little dissapointing, the scene preceding it was great. Enough I wish I could have seen him in his "real" personality longer.
I also wish I could have seen more with Detective Dojima. While I understand that interaction with him had to be limited to make the climax work, I would have been very interested in what spin they could have given an interesting, if archetypal, character.
END SPOILERS