Yeah, it’s a good game! Not my favourite Persona spinoffs, but I suggest you play Persona 5 Dancing In Starlight. A reason why is because Joker, AKA Ren, has quotes. Very small thing, but I love it. I’ve never played any Persona game, but I watch Persona 5 on YouTube. Can’t wait for Royal!
In all honesty, it's a "Do what you want." situation, since they're just rhythm games. There aren't like 100+ songs you can listen or keep coming back to, and atleast, for me it feels like it gets boring around the last stretch of the "plot" they were trying to tie in. Oh, and the story isn't canon, in case you do play it.
If I had to recommend a persona dancing game it would be either 3 or 4. Both have amazing songs include with there respective games. 4 has the advantage of a story mode which is canon to the story. 5 is okay. It plays the same as the others but in my opinion had a weak soundtrack/remind.
I've played all three of them and I can say if you like the music from P3, P4, and P5 and rhythm games then you'll probably like playing any of them. But P4 dancing game has a story mode over unlocking character scenes which I prefer even though P5 and P3 ones are newer.
What do you think?