I bought hearing aids at a cost of £2700 about 2 yrs ago first one of the electric wires broke when we were out of the country for 6 weeks after 7 months. Then it happened again. They admitted that the supplier Phonak had a problem. Then you find that only certain branches stock the batteries, then you find even less stock phonak smart guards. So one shop gives you a leaflet to order them online. Try to register online and at the end of registration process their site goes down so I call the number listed online and after waiting 5 minutes it cuts me off. The way I feel now I would not recommend them or use them again.