It’s a shame because my Viavito Sina Stepper was great for the first year. After that time it developed an annoying knocking sound on one side. I contacted Rob in customer service who was excellent and arranged for an engineer to call me. The engineer called, checked the machine and said it was a small part that’s was faulty and needed replacing. I was away for 3 weeks and when I returned I chased up with Rob to ask him to get the engineer to come back. Eventually after further calls, the engineer contacted me and said he couldn’t remember me or my fault but would check when he got back to the office. He never came back to me. I just gave up in the end and now suffer the knocking. It’s a good machine but is let down by the poor follow up relating to repairs. Two stars because Rob is helpful. Unfortunately he isn’t backed up by reliable engineers for repairs