It's free! So take it or leave it!

But when you work on a game , if you can gain time on workflow , i can assure you it's not something you'll not take attention.
some lag on tools : no thanks : and Gimp 2 is free.

@Fireball :
Well advices of people that have experimented the tool is cool caus it avoids you loosing time testing the tool to finally find the cons
Anyway like Blender, i stick with Gimp 2 that i like a lot !