Has anybody used these things for monitoring? I'm think of my cranes here, where you tend to shift about a bit and keeping a good view of the monitor is not all that easy. I'd like to use the cranes phyiscally faster, but your just lose track trying to keep a frame right with a camera moving at, what, twenty mph?

Indeed if anybody has just used them for watching a video I'd be interested to hear. Lots of claims about apparent screen sizes and 'awesome' quality, but such comments seem to come from sellers, not a word from users.