This seemed especially worrying:

> Tracking was generally good, but objects occasionally shifted or jittered. A few times, animated objects seized up altogether, which might have been an issue with tracking, Lightpack performance, or something else.

I tried a HoloLens last year[0] and, whatever its other fauls, the tracking was perfect and objects moved smoothly like they were actually real. If Magic Leap is behind Microsoft's two-year-old tech, that's a bad sign, especially when they've pitched themselves as being categorically better than all other AR.

[0] My thoughts here: https://news.ycombinator.com/item?id=14106028#14107939