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While I haven't had a whole lot of time to play with these, I have drawn with them a little and have found them worth putting up here. They're far from the best, but I find their tips a lot less stiff than the Sharpie Pens, so they draw more smoothly, which makes them fairly pleasant. There are a lot of complaints about their lifespan (I admittedly haven't used them long enough to comment on that), but there's one reason that this doesn't bother me:
These are far and away cheaper than all the other comparable fineliners I've come across, and what's better is that they're sold in 12 packs, all of the same size. When you go for Staedtlers or Microns or Faber Castell, you're usually going to end up buying packs of different sizes. When it comes to Drawabox, we're primarily only working with one of those, and the others go to waste.
Last thing worth mentioning - the tips themselves are visibly thinner than the Staedtler Pigment Liners that I usually use (that is, the 0.5s) but the lines they draw appear to be roughly the same weight. Might be that their tips are a little more flexible.