I do very little with color at this time in my career. I hope to start doing more in the coming months and years, but my plate is a bit full to give it any additional attention. The colorize tool is intriguing. I don't see it providing an avenue for a coloring option that is equal - or even close - to hiring a talented professional, still there is some potential here.
This is the coloring I created with CSP for a Captain Marvel drawing of mine. The coloring phase of this took less than ten minutes to do:
The "blur" around the character is something I don't think I'll be able to keep from happening. I could clean it up if I had to, but I think it's kind of cool. The color of her face got washed out for some reason. Not sure how to fix that. Alot of trial and error head of me, though.