I've had a pair of these since September 2022 and tried them on quite a few things. The 45* viewing angle is not really a problem, because it's not for VR and VR support is _very_ limited (currently just specific Android devices or with CloudXR on specific GPUs with USB-C DP-alt output). The device support for AR functionality is better but there aren't any killer apps. Although there was a recent tech demo of them being used for live captioning real life.[0]

However, they work fantastically as a _dumb_ external display on any computer with USB-C DP-alt output. Tested on MacOS, Linux and Windows 7. My glasses with the firmware revision from ~November 2022 works without issue on M1 MBPs, 2018 Dell XPS and the SteamDeck. Prior firmware revisions had several issues with misrepresenting their capabilities to the host system causing unstable framerates so older reviews which mention this may no longer be applicable.

Best usecase I've found is for watching films on a plane or in bed. You can comfortably lay flat, staring at the ceiling without the cable getting in the way. But there is an amount of reflection on the screen when used in bright places which can be annoying.

I got mine cheaper imported from Japan. If you're in the UK do not bother trying to get them from EE.

[0] https://www.youtube.com/watch?v=LauvOTnZMZg