I've found that if you play it like a cross between a squelcher and charger it's the most easy way to get a grasp of it. For inking paths, basically you just charge a small bit and create a path instead of charging fully and standing still for 10 seconds.
I would not say it's good at all once someone is like, roller flick distance from you unless you are charged to some degree and have a wall up. While the time to charge 5 shots is somewhat short, you have to hit every single one to get the splat, and you don't have much in the way of a gtfo move if they get around your wall or otherwise surprise you/start juking you out. You're basically screwed unless you can get away or they screw up, and the amount of weapons that can do this to you are pretty numerous.
Oh and don't underestimate the single uncharged paint blob you have! If you've ever had to fend someone off with uncharged charger shots, it's a similar concept. Also great for hitting small spots on walls or to give yourself ink to stand on.
