I love working with Copic markers. They’re easy to use, and they produce such great colors.
However, they’ve got one big drawback: it’s impossible to tell when they’re about to run out of ink. I got most of the way through with Pale Sepia before the marker ran dry. Orange was kind of a substitute but not really.
In fairness, they can be refilled. Sadly, I’ve adopted the economical-yet-dysfunctional practice of not buying refills until I run out unexpectedly in the middle of a project.