This was one of the better games I've rented in the 2 months that I've had my Wii.
After I got used to watching the tension meter at the top of the screen and the indicators for "jerking" the rod to tire out the fish, I did fairly well. I needed some work on my casting distance, but "all-in-all" I enjoyed the game.
It started pretty slow with "grandpa" talking on and on, but it got better. The large fish required skill to reel in (combinations of jerking the rod and reeling at the proper time, to avoid breaking the line).
I would say rent this before you buy. I will probably buy this one eventually.