While the the best of them offer surprising amounts of flexibility, they also impose stringent enough restrictions to page design that you shouldn't be able to create a really bad looking site using one of these services. Typically you can get a Mysite.servicename.com style-url with no commerce abilities for free from one of these services; you have to pay extra for a better URL and the ability to sell. One issue to consider is that if you eventually outgrow one of these services, it can be hard to export your site to a full scale advanced web hosting like Dreamhost or Hostgator. If you know that's where you are eventually going, it may be better to skip the sitebuilder step.
Yahoo's Tumblr is another incredibly popular blog platform that lends itself to shorter, more visual posts. You can, however, find themes that give your Tumblr site a more traditional website's look and feel. Google's Blogger features tight integration with Google Adsense, so making extra pocket change is a snap. Newer blogging services, such as Anchor, Feather, and Medium, stress writing and publishing more than intricate design, but they're incredibly simple to update. website building software