Review on Portable CHANGEdesk MINI: Affordable Small Standing Desk Converter for Laptops, Single Computer Monitors - Lightweight Ergonomic Sit-Stand Tabletop Riser with Adjustable Height by Christopher Karamba

I can easily spend 6 hours on the computer and I have serious back problems. It works as advertised. No build up. Raises and lowers easily and smoothly. Even with a full cup of coffee on board. Not only is the standing height good when I'm lowered, my laptop is now at eye level as recommended by the physical therapist. Enough space for my 15" laptop. Don't let the price put you off. This is a quality product.