For the benefit of future readers debating whether or not to go for the extended edition - I recommend it!
As Hatoge said, the extra endings are accessed quite quickly, but one of them answered a "Yeah but why doesn't he just--" question I had, so that was a plus! Also the bonus content is fantastic; if you've grown to love the cast the extra details about them are a wonderful addition, and I love seeing a bit of history/background into the development of projects too. I also really appreciated the after-endings, they added to the story without feeling like a fanservicey cop-out~