Our experience with the window solar charger has been great. As has been the customer service and support. We were getting great use from our 1st one until the suction cup holding it on the window gave way, dropping the charger to the floor. I tried repairing it myself , but was unsuccessful, so I contacted customer service who agreed to fix it and send me a replacement. In the midst of doing that, I also bought another for my wife for Christmas. She is very “green” and just loves how she can charge her iPhone with this. We have the 2nd one to our daughter in law and she appreciates it too.