I have my Stannah since July 2011 and I am very satisfied. I subscribed to an Omnium contract for which I pay annually a very reasonable fee. Once a year, you come and do the maintenance on my chair and this year I’ve only needed to change the batteries, I never had a failure. Even my batteries were included in the package Omnium. I had nothing to pay. I was very pleasantly surprised. Thank you for your honesty and your good services.