There's a thread in the medium format forum about this program, and I thought it would be useful to discuss in the Micro 4/3 context as well.
There are a couple things I like about C1 v7 for Micro 4/3. The first is that it does seem to squeeze some extra resolution out of the files while at the same time giving them a cleaner, less noisy look than I can manage without abolishing detail in Lightroom. The second is that unlike Lightroom, you can disable automatic distortion correction in C1 - a major plus IMO.
The major downside is that I'm so used to a Lightroom workflow and using Lightroom to manage my photo library. I used C1 Pro for years when I shot Canon DSLR, but I've been using Lightroom exclusively since version 4 and have gotten used to it with color profiles and plugins that fit how I like to work.