I'm not really into rhythm games but I may get it.
Master only one title from dozen of Miku titles that exist, basically you'll master them all.
The gameplays are kinda the same afterall.
I'm kinda bad with Miku games, the speed needed for our fingers to move is insane.
When I played them, I only play at easy mode.
Same thing for Maimai, Ongeki, and Chunithm.
I'd still prefer Rhythm Thief and Space Channel 5 for rhythm games.