its a great idea, and it works with the things i have (ipod video 80gb, sony ericsson k800i and psp). the battery life is ok...you can fully charge an ipod twice but then you need to charge the powermonkey again. not to worry though, as it comes with all the necessary adapters, so you'll only need to take the power monkey charger with you.
it comes with a little bag but the pieces are very small and the ipod requires the cable that you use to connect it with the computer. i've lost my one for my phone, but this is great as an ipod charger, as no ipod comes with a wall charger.
great product - just a bit fiddly and on the expensive side as well... 8/10