The ramblings of a developer
I have switched my blog from Wordpress to Ghost. It wasn't the easiest but it wasn't terribly difficult either. I used the free Wordpress plugin to do most of the work. The only time consuming portion was the media. I had to manually migrate all of my images over. Since I don't have many posts, this wasn't too bad. It also gave me a chance to reconcile and fix some layout issues with a few pages.
Anyways, I highly recommend Ghost. I love the dual pane layout and native markdown support.
-Greg