Why did you order a replacement: Cracking/buzzing earpiece, yellowing screen, stuck pixel, and sub-par battery life.
Did you received the replacement: Not yet. It will arrive on 12/12/12 (
)
How long did it take: Ordered it on 12/5/12, so I guess it took 7 days to arrive?
Did the replacement N4 have other issues: I'll have to report back.
How would you rate the process: So far, painful. Why? Because I'm dealing with T-Mobile and not Google directly. I had to try calling T-Mobile 4-5 different times before they were able to send me a replacement. I ended up calling the advantage line (I have an the advantage discount through my employer) and they finally were able to get me a replacement ordered.
There is a plus side going through T-Mobile for any phone replacement though, that plus is they send me the replacement first, then I send them the defective one when I receive the replacement.
They also take care of the postage, so that's nice.