Didn't actually use the Wii too much for Netflix as I was late to the game on that service, but the few times I've used it, I was really surprised the interface hasn't been used more widely when available. The cursor on screen worked surprisingly well, if I recall correctly.
I don't know many people that don't have some form of HD capable TV. They are so cheap anymore if you don't plan on buying a huge TV, and most of them anymore come with some sort of built-in app for Netflix.
This is a reminder for me that I have Wii points to burn before the service expires too, so thanks for that.