A great game, but if you're older or have bad joints, probably not so great. I thought I was in shape, but after 2-3 games I get some serious tennis elbow issues going on. Which is too bad, really, because none of my other games, even Punch-out, do that to me, and Punch-out is a HECK of a workout. Online games are fun, but most players are extremely advanced it seems, and just about everyone kicks my butt.
We tried another tennis (Virtua i think) and we could not use it as it didn't have a left hand option. This game has online mode so you can play ranked or unranked players. Very close to tennis itself and I get a bit of a work out. Keep in mind you need to bring your racket back to the front after every shot.. then swing as you would in tennis.
I am more into the game than the players you can create and graphics etc. and this game is perfect. You can play doubles online as well.