I get absolutely loads of hits on my old blog about what a Createspace book looks like, but its getting a bit embarrassing as that post is now 18 months old and very moth-eaten. Recently I was home in the UK and I picked up some more recent versions of my paperbacks to do an updated blog.
No, it was single spaced, but it tends to come out looking a bit different in the Createspace template. The pages are a lot smaller. If you have a good formatter you can squeeze it up a bit, but I think 300 pages is a solid length for a paperback so I didn't worry about it too much.
You can find it here
http://self-publishingforbeginners.bl...