Summary: Decently-priced and quietly powerful, there's a lot to like about AfterShot Pro. The lack of some tools is a downside, but you can always assign an external editor in the Preferences for fine detail work.
Pros: Speedy RAW workflow, Layers and Regions adjustments, Adjustment presets, third party plug-ins support, GPU hardware acceleration
Cons: No .PSD support, relatively low number of tools, not the most powerful cataloguing workflow. No Retina display support