Capture One Pro (C1) is a solid RAW converter with superior image adjustment features. In fact, I like that part of it better than the equivalent features in either Aperture, DxO Optics Pro or Lightroom. There are also a number of options for customizing the interface to match your own working style. Unfortunately, other key features supporting the editor are not yet competitive.
I depend on a Digital Asset Management (DAM) system to organize and retrieve images and in C1, the Catalog is just too immature. PhaseOne also develops Media Pro and perhaps, over time, the features of that venerable DAM will begin showing up in C1. I sure hope so.