yes, i agree with you.
keep in mind that the system is two separate units - the battery unit that you charge up and charge from, and the solar collector. you can charge the battery portion from the solar collector, from an outlet, or via USB. so you can start the trip charged up. then you can trickle into the battery (however imperfectly) while on the move in the day (atop a pack) and at lunch/siesta stops (which i enjoy). and then charge your ipod at night off the battery.
for backpacking, it will probably come along on 4-7 day trips when i want lots of music for solo hiking - either just take the charged batter portion to recharge the nano once (or more?) or along with the solar collector if that makes sense.
and of course it will still have utility for car camping, music festivals, base camping, etc.
i was looking at the solio 1000 unit for this purpose, but this seems like a well done item, and for $32 total, it's a steal.
i'll post more thoughts after i check it out!