Product is broken after two years. An adapter has given nothing of itself. Until then, I was very happy with it. Let's see what the TP Link Service does. Since the manufacturer gives a 3 year warranty. So far I have not heard anything yet, although the defective adapter was delivered a week ago.
Update: After about 3 weeks I got a new free adapter from TP Link. Now it works again wonderfully. Hope now of course that keeps the older of two even long.