My QC15s in the middle, are 5 years old, and still work great. My QC25s are the best noise cancellers, I use them for an afternoon nap once in a while, and when my fellow apartment dwellers get a bit too noisy. My QC 35lls are only a month old, and I have pretty much fallen in love with these headphones.
Hey Horseshoes!
Glad you wrote in, thanks for sharing. That's a great a collection. We have a few QC15s around the office as well, live by them!
See you around,
Mohsin - Community Support