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Once I get it into position, its very useful. However I find it to be quite a struggle to get it situated into place for laying down or siting up. Then its value is realized.
The other point about the difficulty of use is that I can see, over time, as I change the positions needed (I need to change positions frequently due to injuries) it will be wearing on the integrity of the joint structure.
All and all, its a valuable source for making my work on the computer or reading easier, but it takes 5 to 10 minutes to make those changes, in addition to its structural longevity.
It will be ideal for you to come up with solutions for both.