Compared to LR, Capture 1 etc, SPP shows it's weakness but I find it quite usable, my main gripe is that it forces you to keep tiff "originals" as well as the initial X3F's, and that apps such as CornerFix, which is designed around the open DNG standard become harder to incorporate into a workflow. That said I have found that CF does work well at reducing the magenta/green casts that are obvious in some Merrill files (but by no means all). I did my initial Adobe Lens Profile (for the DP2M 30mm lens) in a rush, and although these work well too, they did indicate that there was some distortion in the lens, which I thought was practically distortion free. This leads me to be suspicious of the profile I quickly created, so I need to go through the process again, in a more structured way, in order to make sure the profile is good. If I can get to the bottom of this I will report back.