I also think I find it to be a net time-saver, because I outline my next project(s) while I'm working on my current one. I have a definite limit to how many words I can come up with in a day (especially after a day of work), but I usually have another good hour or two in me to outline once I've finished those words. That means that when I finish this current NaNoWriMo novel, I'll have two more outlined and ready to start writing - and I'll write them much faster for having set them up beforehand.

At any rate, I'm not very good at writing myself out of a corner, so it really helps me to have an outline before I start writing. That's how I learned to stop flailing and finish a story, so I'm sticking to it

I don't outline. I tried once, a long time ago, and it killed the story. My biggest beef with the outlining advocates is that they tend to claim "their way or no way" and that's just not true.

Sometimes I do get stuck. Sometimes I do have to cut and rewrite and start all over again. It depends on the book, really. Most times, I'm just an outlet, penning the words. The storydream I'm writing now is one such story. It is writing itself, so far.