I bought it three years ago but I've just started to play with it yesterday to quickly build some placeholder animations for my project, and I thought I should tell you what I write as the title of this post.
I was thinking about using a 2D bones animation software for my animations but I was going for Spine since I use Gamemaker Studio,
However, I think I'll go the full spritesheet way intead with Pixel Over + Aseprite. Easier to tweak the drawing (and so the animations) directly in those tools.
Seriously, the polish function, the fine tuning of the export function, cutting and drawing a sprite, 3D import, animation management, the quality of the pixelart shader, that's really amazing.
It opens easy Dead Cell or Ghost Trick rendering, that's so cool.
Of course, I have some feedback to share as well, but that will be for the dedicated section :D