Garden Flower Bed

I was trolling around the internet looking for some inspiration and ideas for craft projects. On one of my new favorite sites, Curbly, I came upon this:

I think it's kind of cool: A true flowerbed!  Would be great if you had a large yard. This seems more practical if it were made from a single bed. What do you think?

Here's the link:http://www.curbly.com/diy-maven/posts/11133-a-bed-in-the-garden