@Szafir87  
I do.

GIMP? I don’t recommend.

@Sdf1jjak  
It already look almost finished, what will you do which require gimp?

@Lawful Girly  
Not used in the industry, I guess.
 
Also no rotating canvas and no layer group masks, but the former will appear in the next major version.

@d1ckbitch  
I only use Gimp for the later half of my work:  

What’s wrong with GIMP?

Gimp? It looks more like the average picture made by a beginner who cracked SAI / photoshop, believing the software would do all the hard work for him.