Pretty neat for what it is, though I think its probably a tad overpriced if you dont get it on a sale. The story is really nice honestly, I really enjoyed the characters. Akechi and Kasumi are my favorite Phantom Thieves so it was nice to have a story with them again even though they really honestly should have been in the base game but whatever. The music for this DLC goes really hard, and the new paint mechanic is honestly really fun, but like the base game its a little...easy? even on Merciless you can just plow through enemies with even just a little bit of SRPG experience.
Still though I think this DLC is worth it for fans of P5, also just because I rarely see this question answered online: If you beat the DLC you DO unlock Kasumi and Akechi for use in the main campaign but only in NG+ for some reason.