Curlings fine for me, I had a bit more difficulty with the speed skating at first, as did my nephew and sister.
Nephew went batshit loco over this game. Loves Mario, and loves Sonic so the two together was just like an early Christmas present. Should've seen his face, bless him.
The game itself isn't so bad, enough to pass the time. I'd like to see the Dream events though, apparently they're much more interesting.