I've been using Createspace since I first decided to self-publish my books, and for the most part it has been great. There are, however, some negative aspects to the service. When you begin, you are placed with a project team. Now that team seems to change constantly, and so there is no personal interaction with specific people who understand what your book needs. I would suggest not using the editing services because they don't do a comprehensive edit that includes character/plot development, descriptive enhancements, and story flow. The editing services are really only good for spelling, punctuation, grammar, and sentence structure changes. I would suggest using the formatting services, but they don't give you a word version of your manuscript, which is difficult when your trying to submit to other platforms besides Amazon. They don't give you a file when they do a kindle conversion either. Its structured as a monopoly so that you only use Amazon for your sale platform. When you are converting your paperback manuscript to a kindle file, make sure to give yourself enough time. It does require 9 days to convert, which messed up my release date. The support services are decent, but you'll get a different person every time you contact them. Overall, its probably the best service for self-publishing, but they need to improve. I hope this helps other authors as they navigate the intricacies of self-publishing!
Fantasy & Science Fiction Author with the focus on making reality that much more fantastic, and searching history for unique opportunities to tell a different story than the ones in textbooks