I'd get frustrated using it and got hung up on trying do simple things like brush-size or adjusting pressure settings. I liked Krita the most because of its performance and brush engine, but it was very much a desktop application and not the best interface in tablet-mode. I tried several programs (Sketchable, Sketchbook Pro & Regular, Krita, Photoshop, etc.) and while they all had their pros, I felt like their cons didn't make the experience as enjoyable as I had hoped.

Buttery smooth 60fps framerate and brush performance.

Very simple but deep tablet interface, similar to Procreate.

Didn't need to install 3rd party apps to have onscreen shortcuts, like TabletPro.Not rely on keyboard/mouse for shortcuts or functions.I also had some other art/drawing wants such as: I looked at an iPad Pro but it was a tablet and not a full computer. I grew up using Photoshop + Wacom tablet, and loved the digital drawing experience, but I still wanted the more realistic experience of drawing directly on a notebook.

I got a Surface Pro 6 several months ago because I wanted something to accompany my desktop, but also doodle on for fun (not professionally). TLDR: After trying multiple drawing programs, Leonardo provides the smoothest, cleanest, simplest, and most enjoyable tablet experience for drawing on the Surface Pro, in my opinion. Disclaimer: I don't work for Leonardo or whatever.

Artrage 6 review