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It’s well made but from very lightweight material. If you’re looking for sturdiness on a memory foam mattress I’m afraid you would want to keep looking. With my standard 15 inch Dell work (heavy) laptop on it I can still enjoy the height it provides, however I constantly worry about it tilting over should I move a little bit. It rocks back and forth very easily due to the featherweight legs and the design that transfer the weight from the top through only 2 vertical think lines (the legs). My lesson learned is to look for a bed desk with 4 legs and avoid aluminum.
I ordered this to allow me to work on my laptop without anything sitting in my lap and it does. However the stops are in the way and the laptop will not come as far down the tray as I would prefer. I flopped the stops and then turned the tray around and it works. But now I can not use the angle feature because the tray will not angle correctly. It will probably work find with my tablet.