Awesome photo editing software, but not that Photoshop alternative too many people say.
FOR WHOM AFFINITY PHOTO IS: amateurs and freelancers can benefit a lot from Affinity Photo. For 50 bucks no photo editing software give more for the money. Since 2015, when it was released, it receives regular updates and is getting better at every year.
Together with Affinity Designer (vector graphic) and Affinity Publisher (desktop publisher), it is part of a promising ecosystem. Serif did an impressive job.
Those who cannot invest anymore in the Adobe CC suite can step down easily and embrace Affinity Photo, as workflows are very similar and learning curve is very smooth.
According to my experience, compatibility with PSD format is good, and layers structure is generally well respected.
It has all space colours (RVG, CMYK, LAB, etc.) and all photo-editing tool (pen, selection tools, liquify tool, etc.)
FOR WHOM AFFINITY PHOTO IS NOT: big AD agencies, those who heavily rely on the Adobe ecosystem, and those freelancers who make real money on their job are at risk by moving to Affinity Photo.
Even if tools are all present, their performance is somewhat less impressive (ex. the inpainting tool in Affinity photo is good, but in Photoshop is better; same for clone stamp tool, etc.), and the "raw persona" is much inferior to "camera raw" of Photoshop.
No photo catalogue features are included.
Affinity Photo claims to be fully compatible with plugins and brushes from Photoshop but, according to my experience, this compatibility doesn't work properly (or I was just unlucky). Import operations are either impossible to be completed or imported items work differently from expected. Those who have heavily invested in that must think twice before making the jump.