By far, the BEST Olympic game on the Wii... And among the better games using the Wiimotes to date. Worth playing!
I started with myself, my 4 year old son and my wife. Some of the co-ordination required for some of the events was a tad above the 4yr old typical abilities but then again... It was close to the same for my wife. :)
That being said, different events saw both my wife and my son beating me on occasion and the competition was great fun. The multiplayer game should keep people playing for a good long time if beating your own records repeatedly isn't enough.
Comparing your records to those of others online is another thing that may keep you practicing to achieve ranking. Just remember, there's always someone better than you are....