Yes, it really is that good, combat is chaotic at times though you can stop time, which some may see as a bandaid, but you can't use it blindly in the middle of enemy's attack or you get hit. It's super fun and fast paced. Being able to avoid stuff by double jumping is so much fun when so many TPP action games pin you to the ground. New characters have such heart warming stories and great development.
Also strong disagree with Kempokid, 6th dungeon was my favorite in the game easily. The best boss fight too. Oh and Counter Strike is my new favorite Persona song.
I've never played a musou before BTW.