Got to play with a pair today. It was okay I guess. The image quality was surprisingly mediocre and after about 10 minutes the device said that it was overheating (?!) and needed to cool down before it could resume function. The display wasn't vision-obstructive at all and it was comfortable to wear, and when it did work it was responsive and intuitive, so I could see it being a cool product in the final release. This was one of the first explorer editions so I'm sure that has something to do with the technical issues.