I'll try and pull up an example later but I thought it did pretty well with a few detailed images last time I used it. Since it is only applying the dust and scratches (smudge) layer to the precise places where dust and scratches are it doesn't seem to hurt detail much in my experience. At 100% you can tell by comparing it to the source image but at 24x30 prints I cannot come close to seeing any smudge action going on. But I'll try and get an example. Just for clarification, it isn't a global dust and scratches application. You are going back in and 'brushing' where the dust is so the effect is local to the spots.