One day as I looked at my desk, I felt that the computer monitor was too close to me. I wish I could move it back a few inches and raise it a few inches higher. My desk being a height adjustable desk, I needed something that would be attached to my desk. I looked for desk extenders and found this. The desk shelf came well packed with good padding, sturdy looking and easy to install. I think it took me 20 minutes or so to unpack, admire the product, read the instructions and clamp this thing to the desk. Another 5 minutes to keep the computer monitor on top of this and all small items in the lower space under the desk shelf. My desk looks neat and I feel comfortable with the distance and height of the computer monitor. Very happy with the product. Impressed that they thought of the two options - to use this as a 'desk shelf' or a desk shelf + extender if you are like me and want to add a few inches more to your desk in addition to the shelf.