Tested in a BMW, a seat ibiza, a Clio, a van hyundai ... Well it's not bad at all. My husband still lost a small rubber protection of the legs but for the price it's really good. This is an attachment system that suits us fine. So after after having tested one, I bought 3 more. I think that will be compatible iphone 6 because there is room for the width (tested with 4s and 5s)