For years I've avoided using Olympus Viewer as a RAW editor because it's very slow and doesn't quite have the finesse of LR. However, I've ben trying it out the last couple of days because I got a request out of the blue for some corporate photos I shot and the company wants large files, rather than the smaller JPGs that they've seen. I don't mind the results that I've gotten out of LR, but when I worked on one of the files in Viewer, the results were much, much better. I also tried some up-rezzing, going from a long side measurement of 4500px to 6000px and Viewer beat LR hands down; it even did a better job than Perfect Resize. So I then up-rezzed as high at Viewer would allow (8000px) and once again the results were excellent. I still wouldn't use Viewer as my default RAW editor because it is much slower, but if I need to produce more critical files, then I have to say that it will be my go to converter in the first instance. If Olympus could improve on the speed and the user interface to bring it into line with the more established RAW converters, there'd be no need whatsoever for LR, Capture One or others.