Just as another anecdotal data point, my QC20i lasted 2 years, and then I tried to clean them, and the little metal grill went away. I thought it would be good

Just as another anecdotal data point, my QC20i lasted 2 years, and then I tried to clean them, and the little metal grill went away. I thought it would be good to still have them, so I went to a local Bose store, and they were willing to fix it, which was pretty nice. I've had mine since 2015 and they've been around the world with me multiple times.