I'm absolutely loving sketching like this since the texture of the brush does a lot of the work for you and makes the sketch look a little more varied and layered than if I'd used a pencil emulator or hard round. It forces you to be imprecise and to feel out your shapes with the eraser (which I also had set on the smeary square brush), which leaves a 'halo' of texture around your shapes which gives the image a nice subtle variance.
Definitely recommend trying it out for yourself! This is definitely going to be my go-to brush for quick concepting now.