I use a lot of PITT pens and copic markers for drawing and this is my favorite paper to use. It's so smooth and the pen just glides across.
For how smooth the paper is, there is actually hardly any smudging!
It's sturdy enough to take some ink painting as well.

The only downside for me is the binding. It's just a glue. I always end up just ripping the pages out and end up with a bunch of loose papers.

I've been using this paper when drawing and colouring with alcohol-based markers, Winsor & Newton coloured inks, and Indian ink and it's held up very well. There's no bleed through and the inks all stay in place, as advertised. It's good for colour pencils too since it's nice and smooth but can get pretty wrinkly if water's involved.

Great quality.

Love the brand and its paper, have yet tested markers on it but will update on that ones i try it out