I sent in my HTC One S earlier this year, when the...

I sent in my HTC One S earlier this year, when the vibration function stopped working. Not only did they replace the vibration module, but they also replaced the battery and the screen, and put it back together flawlessly.

I was very happy and impressed with their work.

Edit: Update: I finally sent in my HTC One for the dreaded red camera issue (RMA'd through HTC), and they replaced the camera sensor without issues. Good stuff!