Well they are cheap are they not? The answer is yes for the simple blogger, but for a business?
For the technical, you can’t customise the themes, no access to the PHP theme code, the theme’s CSS. You cannot add a new plugins so features like e-commerce are out. Just with those alone missing you can see why it’s ok for a blog, but nothing much more. Anyway consider this, I provide WordPress with hosting and email accounts for just £30 per year and it is totally configurable. They also provide a paid upgrade so I consider that too. What you lose to save £30 is crucial, so apart from a dabble and ‘look and feel’ investigation I would not bother with it frankly if you are in business to make money out of your WordPress website.