Upload & Sell: Off
I've had mixed reviews with Nikon service as well. A D3 I sent to Nikon NY two years ago was a nightmare to deal with, but a 70-200 I brought into Nikon LA a few months ago was fast and easy.
With the D3 I got the initial repair quote within two days of arrival, I accepted, and it showed it was in the repair queue a day after. Two weeks go by, and nothing changes. I give them a call at week three to check in. They said they would be getting to it soon. 2 weeks later I get an email stating the quote had to be readjusted and jumped from $240 to $1,800, because of a problem "they had just noticed". This "problem" was the first thing I mentioned on the repair form, so for them to take 5 weeks to notice it was a disgrace. After discussing how unprofessional it was of them to spring the news of the price hike on me 5 weeks in they offered to knock $75 off the repair. I just asked for the camera back and had an independent shop repair it for a fraction of the price, and in two days time.
Fast forward to last fall and I needed my 70-200 repaired. Despite my bad experience with Nikon NY I decided to give their LA shop a try. I gave them my 70-200, explained the problem and was off. After one day it was in their online system, and after two it was listed as in shop. On day 5 it was listed as the next step after in shop, but not completed. I called to check in, and they said it was actually ready to be picked up as of the day before. They hadn't updated the online system because they apparently send a letter to inform that the lens is ready if you are a local customer. Since the letter had not arrived yet I was unaware it was ready. They should have just called. Anyway I picked up the lens and it was in perfect working order and even cleaned, with zoom/focus rings smoothed out. A completely painless and simple process completely opposite from my prior experience. I'm glad I live close to the Nikon LA shop now that I can trust them.
In related news, I have had nothing but great things to say about sigma repair service. Fast, easy to communicate with, and an even more simple repair process. The free two day return shipping on all repairs was nice too.