Though I had a couple of minor issues with the initial blog import, I'm really impressed with Squarespace. For those who enjoy rapid address propagation (as I do) the switch from Wordpress has been virtually instantaneous. It can take up to 48 hours. Apologies for any inconvenience during this period.
Translation of the old Wordpress content was imperfect. I've been through every single post and removed broken internal links and numerous images. So some of the content has subtle changes to reflect this, but no post has been wholesale edited. A couple may refer to images that are no longer present, but on the whole posts are as good as they ever were (or as bad).
I'm not sure how the switch will affect RSS. Hopefully there'll be no issues.
I am still tinkering with the layout and design a little, but on the whole I am pleased with the site. I'll be keeping an eye out for any issues, and comments can be left on this post, or you can find me on twitter via the twitter icon at the top of the page. Do expect a few cosmetic changes over the next few days.