When I bought my D700 almost four years ago my initial impression was that it was over-exposing by half a stop, so I set b6 to -3/6. However, after operating the D700 for a short time I realized that it was not over-exposing after all. Therefore, I set b6 back to zero where it has remained ever since. I hardly ever use the exposure compensation button. In fact, the last time I used it was so long ago that I can't remember when it was. I commenced shooting RAW exclusively a year ago and find that any tweaking of exposure that may be required is easily accomplished in Adobe Camera RAW.