I ended up picking up What A Blast! (the orange lip pencil) this weekend. Those of you who are friends with Morange know that she likes to get all over your face after a couple hours. For some reason, that lipstick is the messiest one I have! Anyway, I tried the pencil two ways. I filled in my whole lip at first. I found it a bit difficult to get an even finish. The pencil was picking up bits of dry skin I didn't even know I had. It really pops Morange, but I like to wear it a little blotted/sheered out so I don't scare people. Also, after a few minutes the pencil must have dried more and my lips got super wrinkly. I might try this again later on once I get more used to the texture of this product. I think a lighter hand with it and more attention to its drydown would probably improve the results.
On my second go, I just lined the outside without filling in and I found this to be very satisfactory -- I was able to wear Morange for hours without feathering or a big smeary mess if I ate/drank something. I had to top up more than if I'd filled in the whole lip, but it was still much improved on the wear time for Morange by itself. I might stick to the regular lip liners in future (they work well for me, are easier to get right, and are cheaper), but if you like your orange lipsticks it's a good addition to your stash.