I like that it helped me figure out how my book should be structured without any help from anyone else as far as writing goes - we're all writers here afterall so why would someone want their work edited? The only thing is i wish there were more options available for scenes/chapter titles (it's hard sometimes just trying).
And also if its not already being suggested by other people who have used this software but feel free because they are usually great resources in general when working through anything technical that could cause problems such an issue solving structure issues etc.. This program has done wonders helping us solve structural problem while at same time making sure everything works properly within chapter headings which helps tremendously knowing what chapters belong together.