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In keeping with Gimp Chat policy but wanting to give some feedback since I promised...
CONS: It's not free. Third-party plugins (not free) not all work at this time with the program(s); yes, two, Affinity Photo and Affinity Designer depending on your need. Support is adequate at responding but no foreseeable solutions until next update.
PROS: Currently for us Mac folks. It had me at "Inpainting". Non-destructive: "Live Filter", Adjustments, Styles, et.al. Ability to save work with "History". It will be available for Windows (currently a Beta version available).
Having said all of the above, there are things that Gimp gives us that AP at the moment does not (not to mention that Gimp is thankfully free and we have our amazing script and plugin compilers).
There are many videos that show what AP and AD do... and would more adequately give an accurate picture (no pun intended) as to what they can do.
Hope this was helpful and if I've done something the Board disapproves of, my apologies.