You know how some stories you have to work at, and some just work? Effortless, easy, no thinking involved: they just work.
And when you're writing one of those, it's a float-on-top-of-the-skies feeling. Sheer writing joy! It's like you can do no wrong. Just get out of the way of your subconscious and let it do its job. All the dramatic pieces just fall into place of their own accord, and you don't have to wonder if it's going to be any good or not because when it's right, it's a totally different feeling from stories you have to, well, work at.
ILS is like that. I haven't had this much fun letting a story write itself since DTD. That one also wrote itself and it worked.
Maybe it's no coincidence that I'm doing the final edits on DTD in the mornings at the same time I'm writing ILS in the evenings.