I have a 30MB iPod that after 2 years didn't really hold a charge anymore. This docking station was a great answer. I leave my iPod in there and it runs flawlessly. I did get a nano for the road too... and swap them out when I need to charge it. There are inserts for different size iPods, but I don't use them, I just swap the iPods and it works fine.
The AC adapter is a bit clunky.