The book is of course better for the work put into it. Several stalwart first-readers helped a huge amount and will be rewarded with (secret-secret-secret) once this little (!!) lump of text is on its way to Editor. When there's not enough time between finishing the main draft and heading into revision, those extra eyes can't be skimped.
Those interested in the process this time can find clues over on the Paksworld blog where I finished off some evenings with a post-midnight report.
By the way, Happy New Year.