My opinion is that if it will get you up and going more than you are now then it's worth it. My mom is not an active person at all, but she enjoys the Wii Fit and it's helped her lose weight. Because of her work schedule, age, weight, and some arthritis issues it works well for her because it's a light workout. If your looking for a more intense workout you might try something else first, like buy a $5-$10 workout DVD that will get you moving. Also, if you have an Xbox too my hubby bought a kinect for the Xbox and the games on that get pretty physical. The kids and I are always sweating and out of breath when we're done with games like Kinect Sports, Rabbids or Just Dance. Good luck with your decision!
Goals for 2014:
Complete Couch to 5K- DONE!!!
Sign up for and complete a 5K- DONE!! 35 mins.
Plan at least 3 outings with the family that involve being active- 2 done