I personally tried them and was very impressed. Sure, field of view could be better, but as far as I know they are the only company that have figured out how to

I personally tried them and was very impressed. Sure, field of view could be better, but as far as I know they are the only company that have figured out how to do inside out tracking 6 axis tracking. It's also a fully untethered experience, which put them ahead of pretty much all the competition in term of AR (in my opinion).