I have this cable has now been over a year in regular use (S 2) and rejoice in fact still every time in the automatic document feeder mechanism. That's just awesome practical (and should at a lot more cables - even in the household - are used). By a car or the car charger I do not expect it to my smartphone battery at the same time charging as is the case at home. Nevertheless, it is often on the road before that the battery has dropped and then I'll be happy when I get a little can improve the battery while driving. This works quite well, because while I drive, I do not use the phone, it may turn even from all over and even if the charging course is slower than at home, so I went but glad when the battery charge is increased by several percent. Ie, the less it is used during charging (eg navigation system or Bluetooth music), the faster it loads on - this is in the car as well as at home.
Am I smart phone-use passenger or let navigate me, I am charging cable in order to prevent the device usually discharging. This works very well, the achievement of the goal of my battery is by no means lower than when the bike, on the contrary, even a minimal increase was carried out (1-2%).
Conclusion: For me and my S2 the ideal car charger cable, the winding mechanism still works perfectly - I am completely satisfied and my expectations are met.