I just bought a 27" D9200 around a month ago, and had a shipping issue with it (when ordering make sure to ask that they ship it by freight, NOT fedex). They were 100% helpful in fixing the monitor fedex aparantly broke, cross shipping me a replacement (this time by freight) and getting fedex to pick the broken one up w/ no shipping cost to me. This was some of the best customer service I have ever seen.
As for the D9200 I have now, it works completely flawlessly and has so for several weeks. I was manufactured around July 1rst of this year if that helps or means anything.
Like you I was a bit worried about getting a D9200 after I had read about several failures on the web, but after talking with several people I decided that wasn't the norm and many units that shipped worked flawlessly.
Again, like I said the customer service I received from WG was second to none, hopefully you wont have to ship a monitor back though. As I noted earlier, make sure you get them to ship by freight, the guy at WG who handled getting me a new one shipped said to make sure and tell them that the next time I ordered he apparantly has seen fedex bust quite a few, and they won't even ship by ups anymore because they have an even worse track record.