So here's how that works:
First, you adjust the straps in back, like a baseball cap, for the size of your skull. Then, slip the back on the rear of your head, and pull down the front. Cinch the straps tighter on either side (you'll hear clicking sounds as they ratchet down), and with any luck the weight will be situated on the forehead cushion rather than your nose. If so, turn on the HMD with the power button, pull the headphones down over your ears, and adjust the diopter (moving both lenses) until the center of the picture is clear. Then, slowly and carefully move the rest of the unit until the rest is in focus and the test pattern doesn't show awkward ghosting. Adjust the straps again if necessary to keep it that way, and enjoy your content. Oh, and of course you'll need to have the HMD plugged into the included set-top box, and have it plugged into your video input source.
Once you've got everything adjusted exactly right, it's not nearly as troublesome the second time around — most things will stay in place — but even if you're struggling with the initial setup there are a vast number of tweaks you can make. In addition to the top plastic and bottom rubber ratcheting straps and the five diopter adjustments, each earpiece moves forward, back, up and down through 24 different positions as well, and the kit includes a second, thicker forehead cushion and a second place to attach those cushions for larger skulls. There's also a sweat-absorbing cloth cover for those cushions, and a tool to tighten the bottom strap. Still, Sony didn't fulfill all of our adjustment needs. You can only adjust the diopters as a pair and horizontally, not individually or vertically, which would have made mounting quite easier and more precise. On the plus side, I tested on four different sized heads, including one with glasses and — eventually — got all of them to fit mostly right.
Compared to getting the thing properly seated on your head, actually using the HMD is a piece of cake. It automatically detects native 3D content over the HDMI 1.4 connection and switches into the right mode, and admirably negotiates between video and audio streams, HD, SD, stereo and surround sound without putting up a fuss. If you need to adjust the volume or mess with settings (of which there are quite a few), there are handy, tactile, and easy to reach buttons on the underside of the display. Not only that, they're HDMI-CEC compatible too, so if you've got a PS3 Slim or a compatible A/V component, you can send pause, play, fast-forward, rewind, next and previous commands with the very same buttons.
When you pull the HMD off your noggin and release the forehead pad, it automatically turns off the OLED screens to save power and prolong their life. One omission, I suppose, is channel-changing controls for watching TV, but there's enough space to look down and see what you're doing with your hands as long as you've got a remote.
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