I've been trying out Corona since just before Christmas, and over the past couple of weeks I've been doing an image a night. Nothing too complicated, mainly just trying out different techniques; playing with Megascans, SSS and volumetric materials, procedural texturing etc.
So far I'm pretty impressed. I've been a happy VRay user for the past 3-4 years, but so far working with Corona has been much quicker and a lot more fun.
Cheers