We ordered the above and do love it. I wear a tri-focal and having this much height for our monitor makes it much easier for me. Without it I was bobbing my head up and down making it uncomfortable to be on the computer too long. No more neck aches. Also because of the width of the stand we can slide the keyboard underneath the monitor and make use of the desk for other things to do.
We purchased two and both had the same issue. The top of the stand (the metal shelf) bows in the middle meaning the monitor will shimmy and tilt rather than standing flush/ solidly. You can use it by placing the monitor all the way at the back or all the way at the front but seems ill-designed for its only job.
I wanted something to bring my monitor up and also utilize the space underneath. This did the job. I've got my CD burner and USB hub underneath and out of the way but very assessable.