If you expect something more then tennis, no it's not. But if you like Tennis and like a good challenge (those special games are hard and it's even harder to unlock everything) it's a great buy. Even if you play Online, that's still a lot of fun and not as bad as Mario Kart 7's lag issues.
Just because you use a Chance Shot doesn't guarantee you'll win the point, neither. If you're willing to shove some good time into this game then go ahead and get it, because it'll take a while to unlock everything for your Mii, then there's the hidden characters, best to clear the last Champions Cup with ALL characters to get their Star versions, then you'll need to clear the Star Open to get a new court which isn't easy, then don't forget that's 8 Cups in all which is then DOUBLED because you have to play in Doubles matches as well.
But, if you do not like tennis, not even if you take out the famous guys and girls and shove in Mario characters, then no, it's not a game for you.