I've had the pedalpower, and the biologic (w/ schmidt hub), and am no longer a believer. You need to maintain a good pace for a long time or risk having the battery actually discharged. If you are going to stay at regular campgrounds, it's much easier and cheaper to get a decent battery for $40, which can charge an iphone 4-5 times. I've never been on a tour where I couldn't fine a place to charge the battery every three to four nights, though I'll grant you that there are seemingly many people on this board who have.
On my latest tour I took two of these, though I never used the second battery. This was for iphone/ipad mini/mifi/dinotte and maybe one or two other things.