I learned a few lessons while putting together my sit & stand desk and installing this dual mount. First and foremost, the mount is fabulous. I have 2 27" HP pavilion monitors set up. There has been no sliding, no sagging, no problems at all. Install was easy with a few lessons learned below. However, the lessons I learned were completely independent of this product. The mount is truly a great purchase. I paid considerably less than many of the comparable models out there and am tremendously happy with the mount. I did have to mount VESA adapters on both of my monitors which increased the overall cost by $55, but this mount saved me enough money to make that affordable.