Brought my HTC One to Wisma Kemajuan on 11/08 to fix the purple tint and was told it would be done in 14 working days. Got an email and call on 02/09 saying that it's done repairing, so they overshot by 2 days.
Hmm, the usual nonsense from HTC customer support as what many others have faced. Called 2-3 times a week to check on the repair status and all you will hear is "Your device is still under repair." When you make noise, you get the standard apology and "We will escalate the issue and push harder for you." or "We will make a strong remark in our system." so don't expect more. Just pray hard and wait for that sacred email/phone call. They are polite but can't help much and 9/10 times they won't call you back when they say they will.

I did call and email them urgently on the 13th working day to inform that I will be moving overseas in the 2nd week of September (the truth), and my phone was done repairing 2 days later so I don't know if that had any effect in making them hurry their asses up.
In the end I collected my phone today (09/09), after no news from them since 02/09 even though they said they will call me when it's ready to collect. I had to call them myself to check.
But I consider myself really lucky to have my phone back within 1 month, camera works perfectly now and no other defects.

Other than a lot of scratches on the screen protector.
And there was one male customer support agent, who said he would call me back the next day at 12 pm, and he really did, at 12.02 pm sharp.

Wish I could remember his name!
Hope the new camera holds up because besides the purple tint problem, I really really love my HTC One.
Be sure to check for other issues. Mine came back with microphone issues. Sent it back, and now it came back with an faulty earphone jack.