I LOVE these window boxes.  I was surprised at how well built they are.  I love the look, and the sturdiness of them.  I have them just sitting in front of my window, but they have brackets included if you want to attach them to something.  I also love that there is a trough to fill the water in.  There is just one hole in the bottom so the soil stays moist longer.  They are just perfect for my purposes.