We got lucky and got one at the local Best Buy 2 days ago (they're marked up EVERYWHERE else online that has it available so we were about to just overpay for one, phew) and let me tell you all, it really DOES work your arms and shoulders. After playing a few rounds of boxing w/DH all day yesterday (and winning, woot!) I could barely lift my arms to get in and out of a tee shirt. That boxing game is no joke. So much fun too! You can take a fitness test (w/the sports package that usually comes standard w/the Wii consolee) every day and see how you improve at each different sports game so it motivates you to come back to see improvement. We can't wait to get the Wii Fit but like many of you have pointed out, it's sold out at lots of places so you have to just call around on a regular to check availability. I'd go play now w/DH but seriously, my arms are done till tomorrow. :-)