If you are easily motion sick they will not work for you. They’re a great product though, and I love the idea. Unfortunately I move my head around too much when sitting still I get motion sick trying to read text.
The Nebula software they have anchors the screens in a stationary spot which helps alleviate the motion sickness.
As someone who suffers from motion sickness since I was a child, as well as with the earlier headsets, the advent of passthrough mode has been delightful. Seeing the world around you is a game changer in that sense.