I waited months for this title and honestly, it was worth the wait...
I understand there is a learning curve to this game with the new Wii Motion Plus but doesn't that apply to all games? Within 10 minutes, my parents and sisters and fiancee were all on there way to play some fun tennis. We enjoyed the graphics, the colors, the voices/sound, the pro players and such...everything seemed very solid to me.
I think the only down fault or issue that got to me is that you can't have a career mode (or at least i haven't seen it yet). But otherwise great game and a great family game.
I'd say rent it before buying it if your unsure, only because it has similar playing qualities to that of Wii Sports tennis but you need to be a bit more quicker for this.
I personally recommend it if you've been waiting for a bigger and better game then the Wii Sports Tennis.