The Pool game is spot on. The physics are exceptionally good, you can even chip and swerve the ball off the table. I'd buy Wii Play for the Pool game alone. Who ever said it was barely a game? it is POOL, pot the balls in the correct sequence - more points for plants etc.
I also play the one with matching wiis, finding the odd wii out etc.
Though 1 or 2 of the games are absolute poo. Oh and there are 2 hidden ones I;ve yet to find. I'd recommend Wii Play for the extra £5 - loving the pool game, works brillantly.