I find the recent updates of C1 very useful. I can do much more in C1 non-destructively now, before sending the file to PS. Which is good because I often run into file size issues with PS or TIFF files from the IQ3100 back - it doesn't take that many layers to get there (basic retouch, frequency separation, dodge/burn, colour grading, add grain and oops, we are at 2GB, easily). Layers in C1 have been a blessing and especially the functions to fill or refine masks, make masks from colour or luminosity ranges. The latest improvements to healing and cloning finally make these function usable in C1.