Fantastic!

Having been developing with the Vive for most of the last year for Left-Hand Path (http://store.steampowered.com/app/488760), and given I've got a lot of mocap experience before that, I can confirm that Lighthouse's tracking is ridiculously good.

It's not just as good as something like an Optitrack system: it's significantly better.

If this provides comparable tracking to what the Vive offers, it's an absolutely unbeatable price / performance combo.