I decided to buy this today. I've watched videos on it over the past few days and I have to say it's very familiar and acts like PS in many ways.
There are things I'm not up to speed on and other things I like over PS so far.
I grabbed an old image and tried a quick composite just to see how the selection/masking works and I like it better than PS and it's even on par to Remask 5.
Only spent about 20min on the below photo and not really done with it but figure it's decent enough to show..
I edited the RAW in Affinity, masked her off a neutral background. Used Affinity's Freq Sep filter to clean up her skin and then used the Lighting filter to add a bit of drama.