Great tennis game - BUY IT!
Customer Rating: 
The only reason I didn't give it 5 stars is that it's not quite perfect - in that one could argue that more expanded gameplay options would make it better. But for all intents and purposes this IS a FIVE STAR game.
Contrary to some of the reviews here I found the controls (using Motion Plus and Nunchuk) intuitive and more easy to use than I had feared prior to playing the game. The only control issues I have are forgetting to pick a side and start my backswing early enough when facing very fast balls. Such is life.
I quite like the graphics and sound. While obviously the characters are stylized, the quality of the art is such that it is quite obvious who they are. Even the little details such as expressions and slam-specific attire are not overlooked. The real life sampled sounds are exquisite and make the game much more immersive. One can even tell how the ball impacts the strings (or the frame) of the racket by the sound, before you see the effect. The animations are fantastic. Rarely is there a glitch in the movement, which is impressive for a game with so many sudden direction changes. The swings are player-specific and well done too.
Winning a match is much harder as a 0 star player, even on easy difficulty, than it is as a 3 star player on medium difficulty. Or it could be that my human skills have improved along with my computer counterpart. I played my first year on easy and sometimes would reset the game instead of taking a loss because I wanted to build my player more quickly. Yes, this is cheating, but there is only so much time in life to play games and I want to have fun in my down-time. After winning every slam my second year, without a reset I might add, on medium difficulty I have switched to hard for my third year. I won my first (1 set) match, against a 3 star qualifier, 18-16! I think this indicates that the game has sufficient difficulty to entertain me for a while!
Tips:
1) Use the motion controller plus and nunchuk! There is no way to fully appreciate the game or use pro-level tactics without being able to control your footwork and your wrist spin.
2) Start on easy difficulty, and cheat (reset) for the first year. It will still be difficult to win (and fun), but this will give you bonuses that will let you play legitimately the second year and have even more fun.
3) Have an idea of how you want your character to play, then select the best bonuses to that end. Ignore the game's coach.
4) Practice on the practice court! Try out different techiques with each shot type - vary your wrist movement, swing level and timing. Good practice here will makes your swings second-nature in matches.
5) Just because you got to the net doesn't mean you need to stay there. More advanced players will lob over your head, and often it can be advantageous to change your spacing if your opponent closes as this will open up passing opportunities.
6) To pick a sever direction, just move the nunchuk hat to the side after the ball toss. To really nail the lines (the only way to ace) you need to use additional wrist movement to create ball spin. This is also helpful, even if your serve isn't great, to position the opponent.
7) Movement! Tennis is ALL about movement. Keep your feet going, have a plan of where you want to go even before you hit the ball, and try never to find yourself flat-footed waiting for your opponent to hit the ball. Spacing between your player and the ball significantly alters how it is struck. Try not to be too stretched out or too close. Sometimes it is beneficial to step in and take a ball early to give your opponent less time to react (watch Serena Williams play).
8) It is much harder to volley line than cross court, so if you are having trouble with an opponent at net think in terms of using his volley to put him in a position so that it opens up a passing lane for your next shot after his volley.
9) Note that your player's follow through angle and your own follow through angle may differ, depending on how close to a side line you are. Work this out on the practice court so it doesn't surprise you in-game.
10) Remember that tennis is a THREE dimenional game! Use angles, lobs and drop shots to take advantage of your opponent's position on the court. Both your depth in the court and the opponent's radically alters each player's options, both defensive and offensively.
I play as an offensive baseliner, but I often use serve and volley as a tactic. Essentially I play how Roddick was trying to play under Conner's tutelage. I rarely stand toe-to-toe in a point, but rather use my ground strokes to position the opponent for a winner or so I can advance to the net.
The bonuses I use are:
-Roddick's serve
-Hewitt's speed
-McEnroe's forehand topspin
-Nike shoes that give me more hustle
-Wilson racket with increased backhand topspin
Overall I find the game a very decent simulation of actual tennis. It's a LOT of fun and I highly recommend it.
