I’ve just gotten myself two Copic acrea pens (black & white) to test. I know Posca is the rave & Copic declared dead (I’m still using them since I bought them in uni - never had any regrets). The white Posca isn’t really working for me - when I’m working in black and white only. The Micron/Sakura have done a great job so far, but it doesn’t hurt to stretch my feelers into new territory & an array of options. I’m positively giddy. New material gives me always this childish excitement.