idsyphe
Head-Fier
Just got my replacement K371-BT, for reference bought my first set in July last year. These new ones have a much stiffer (in a good way) folding mechanism, plus the power button isn't loose, I never had problems with both of those aspects in my old set, but it's noticeably different on these. Other than that, these are much more stable on my head, not sure if that's just because it's brand new, but all the same, these feel much nicer to use.