The game never gets old, gives you a great workout (even tells you how many calories you burned after that sport), but the graphics are horrible, and the difficulties are just right, so an eight is what it rightfully deserves.
If you're getting this game because you're excited that there is finally a Kinect game for football or baseball, then you will probably be disappointed. The games are too over simplified for the avid sports fan. That being said, it is entertaining and you can really work up a sweat. For me, it got old, as the content is limited (unless you pay for extras). I played for about 3 hours, then stuck it back in the mail box.
This is the first game I rented from this website .. it's really addicting and fun to play. Sometimes it doesn't recognize the body stance in golf or baseball because of the bad lighting I have in my room .. but when I play it the morning with my huge window open .. it's perfect!