I have used this film at 400, 800 and 1600 (processed in Ilfotech HC at 1+31). I have found that it has superbly fine grain and sharpness, as well as producing a good range of tones. When pushed, it performs superbly, only increasing grain size slightly, and retaining excellent detail in highlights and dark areas. When my current developer runs out, I shall try it in ID-11.(posted 8606 days ago)