Killer7 is truly an unique game, so I want to discuss it, Killer7 thread! Minor spoilers ahead.
>In the gameplay department it's pretty competent, personas have different abilities and strenghts which are really pronounced (except coyote, which I never used that much). I feel that the gameplay is better in the early-game where you aren't so strong, which makes the fights more dangerous and engaging, they introduce some harder enemies later on to balance the power-ups that you gain, but they weren't that difficult. This may be different however on hard mode, where weakpoints are removed.
>Puzzles are really simple and straightfoward, which is fine, but I think they could have been contructed in a better way, having to switch characters just to resolve the puzzle is time-consuming, the ring puzzles are just as brainless but atleast they don't waste the player's time that much. Iwazaru's tips could also have been in text form as to not waste time since he likes to repeat that one frase a lot.
>Visuals and music are fantastic, it has a very simple style but it's great at building atmosphere, certain parts are legitimately scary, which is enhanced by it's great soundtrack and sound effects. I Also like that the more violent/mature stuff is in service of the story and are (for the most part), tastefully done.
>The greatest strenght of Killer7 is the story, I have to admit I was lost until the end. I could figure out some themes that run through the game and some plot points, but I was pretty confused. That doesn't mean the plot is bad, it's just really complex and open-ended, every player will have a different understanding of the story, I had a lot of fun creating my own explanations to the events of Killer7 and comparing to other people theories. If you want a deeper understanding of the game, check out this plot analysis: gamefaqs.com/gamecube/562551-killer7/faqs/38193. It really helped me appreciate the game more.
It's an amazing experience, go play it!