They're not paying me to advertise for them. I'm just so enamored of this product that I can't help singing its praises. The software is easy and intuitive, and the index cards on the bulletin board at the top of your project mean that you can shuffle ideas and story fragments any which way.
Also, the ability to compile all chapters into a single cohesive document is not only genius, but you can save it just about any format you need. PDF, .MOBI, .RTF, .DOC, you name it.
It is, simply, awesome.