Surprised at the lack of impressions, so I'll leave my own behind.
Did my first playthrough on normal and got the True Lover Ending.
I'm absolutely infatuated by the game's gameplay, music, and visual presentation. It's the perfect package and rewardingly challenging, I've gotten six gold trophies so far and working on the last couple. Babel is a whole different ball game, but completely addicting. The bar and text message system are a great tease for things to come in Persona 5, hopefully we get some info at TGS this September.
If you are playing on 360 like myself, you can get Vincent, Catherine, Katherine, Erica, and Midnight Venus Gamer Pics in the Septemeber 2011 Issue of OXM. Picked one up tonight at Fry's for 9.99 US before tax.
Later, I'll have impressions of CO-OP and Versus, but my friend wants to finish his first Golden Playhouse playthrough before playing with me.