I purchased the Sony WH-1000XM3 headphones in March 2019. I treated them with kid gloves, always storing them in their hard case when not in use. In January 2020, I noticed that the left-hand slider was loose, and the ear cup would slide down as soon as I would try to fold them up. On close inspection, I saw that the sliders on both sides are cracked. I then read about the issue, which seems to be very common: https://community.sony.co.uk/t5/portable-audio/wh-1000xm3-headband-strap-broken-under-normal-use/td-p/2674208. Sony disagrees. Following inspection, they wrote back that the defect is due to ‘physical damage’ and invoiced me £96.71 for replacement parts and labour costs. I decided not to repair them as there is no guarantee that they will not break again in the very near future. I still had to pay a £30 refusal fee. Altogether, these headphones are a waste of money given the alternatives currently on the market. I will not buy anything Sony again.