It always was a problem getting the plug to seat in the phone jack because of my Otterbox phone case. And I wanted the lower liability of using a chip reader. So I've been using mine since it first was available. In general it is quick and easy to use. Had a problem a week ago when the green indicator lights were showing a 50% charge (2 lights of 4) but the phone would not find it, even when they were head to head. Fortunately the customer was understanding and came back this week. With a full charge again it worked perfectly.