Our office purchased 2x Sit-Stand frames, and had the tops custom built from Recycled Timber. The installation of the desk was very simple and we were able to be up an 'standing' the very same day. After 8 months of use, we enjoy a much healthier desk-based lifestyle, and would recommend to anyone working a desk that a Stand desk - is a necessity, not a luxury. The Top came up magnificent and weighed a considerable amount which had no effect on the stability of the frame. The frame alone holds plenty of weight, including an external monitor, laptop, regular desk essentials and the recycled timber top. Couldn't be happier, many thanks