Good game to play with family at this price, but personally I think it will add more fun if you plan to pick up a Taiko No Tatsujin Controller. Or more arcade like controllers, i.e. lv5, iine pro or taikocatz, though value is debatable if you're a causal gamer.
Price appears to be history low according to Deku. Special ends 25th Feb.
Also discounted, but not lowest:
Taiko no Tatsujin: Rhythmic Adventure 1 84% off @ $6.95
Taiko no Tatsujin: Rhythmic Adventure 2 also 84% off @ $6.95
Why was the original game delisted? It's in my wishlist but now says unavailable