I was impressed at how easy it is to use... just plug & play. No voltage to set, no buttons to push. Indicator lights clearly show how much power remains. The added home & car chargers are nice things to have, especially since I can use the car charger for other USB devices too. Come to think of it, I can use the car adaptor (or the basic USB cable) to charge the R07 from a solar panel too... just need to get an additional connection cable to be able to use the battery while it is charging. Canadians can order it through ModernOutpost.com (they already have them in stock).