With a first flight in 1997 and introduction to service in 2005, this no longer produced golden oldie cannot easily be compared to hypersonic testbeds.
But it is still fair to say it did much better than older generation fighters and its accident rate compares to that of Typhoon, Rafale and Gripen.
So in this regard, there is really nothing special to say about F-22, as many other posts in this thread have already stressed.
Of course, F-22 is in the press crosshairs and attracts negative comments on a routinely basis: http://www.wired.com/dangerroom/2012/11/f-22-crashe/
The real thing worth mentioning however is that USAF routinely flies fifth generation aircraft, and I guess those who are desperately trying to copy this as well as those who are frantically digging deeper holes to hide got that message as well.