I have used Delta 100 in FG7 w/ SS, and I've gotten very good results. Sharpness was VG, grain fine and tight, and tonality VG. My only complain was that I would at times lose highlight detail or separation in some cases. I tried various exposure/development combinations, but always to gain highlight detail, I lost something else--like midtone separation or shadow detail.(posted 8477 days ago)Eventually, I tried PMK. Once I had developed a roll of Delta 100 in PMK, I never used FG7 again. PMK with Delta 100, Delta 400, FP4+ and HP5+ yields fantastic results. The staining property of PMK masks the grain so that it virtually disappears, and the stain also ads highlight density which contributes to highlight detail and smoothness that you have to see to believe. And if that weren't enough, it is fantastically sharp, with superb midtone gradation! In short, FG7 is a good or better as any other commercially available developer, but PMK is MUCH better.