Had I not gotten this on the PS2 I would definitely consider getting it now.

My main trouble with the brush on the PS2 version was getting the system to distinguish between the slash and the vine techniques. There's one point where you have to attach bulbs to other hooks with vines, and you have to do it within a time base. I found that if I drew straight lines connecting to the hooks, it would often think I meant to do a power slash even though I started the line on a bulb. In the end I got around this by making sure that all vines I drew had a bit of a squiggle in them.

One great thing about the brush techniques is later in the game when you start getting the optional upgraded brush techniques, like wind storm or fire blast. Make sure you save up your demon fangs so you can use these a lot.