Just had mine back from HTC (Repaired for yellow spot on screen).
The service was pretty good, they did take 8 days, but I had phone calls from support to apologise without having to prompt them.
The phone seems OK, it's a different serial number to the one I sent in, but had all my 'settings' on it. The upside was I had forgone the Dropbox 25Gb since the original owner (second hand phone) had swiped it.. Since this is effectively a new phone, I got the 25Gb allocated as soon as I logged it into Dropbox, so that's a small bonus.
I have to say, after downloading the updates*, I really did miss this phone, it's far far quicker then you ever need (even if not quickest in class), and the styling/screen are just a joy to use, I can't get over how much slicker the browsing experience is compared to even my old DHD..
* - The latest firmware definitely seems a lot slicker, especially if your turn on the Force GPU Rendering developer option which now actually works..