It Depends. If you are talking e-publishing don't forget Smashwords, Lulu, Booktango, Barnes & Noble Pubit, Scribd.com, i-books author & Bookbaby. If you are talking hard copy POD, those I've seen from AmazonCreate Space were crap. Text not square on pages, no front matter etc.
Purchase own ISBN. Format for PDF using a suitable DTP or editing service and take PDF file to local printer. I would never use a company that advertises 'We Will Publish Your book' when it is easy enough to DIY. IE, real Indie self publishing.