I now have had the product for 11 months in use and am not thrilled. Only the winding mechanism is practical and stable, but the charging time very, very slowly. If the cell phone (Samsung S2) (with GPS and not connected screen) used for example as a navigation device, the amperage is not sufficient to hold the cell phone on a level.
Since yesterday, the charger is broken. The very thin cable comes namely without strain relief therefore, and eventually slips out the ladder from the USB plug. For the price you can not expect that, but you should look for better equipment.