After sale service
I emailed customer service regarding my Sihoo c300 office chair due to me breaking the backrest. I emailed to buy a replacement part as it is most definitely out of warranty after 3 years and purchased from amazon. Customer service replied within days and offered to send out a replacement backrest completely free of charge. I received it in a few days delivered by DPD and it's a perfect fix. I am delighted and very surprised with this after sale service.