There is no "screen" -- Gear VR uses your Note 4 screen, which is of the 5.7-inch, Quad HD (2,560 x 1,440) Super AMOLED variety. It looks crisp, and the Cirque du Soleil video I watched was neat. When I turned quickly, I wasn't able to discern any major irregularities ("screen-tearing" or other nasty hitches). It's got a 96-degree field of view (just four shy of Oculus Rift's latest kit) and a 60Hz refresh rate. There's a square touchpad, a back button and a volume rocker on the right side of the headset; the touchpad is used for tap-based selecting, while the back button is both for exiting software and enabling pass-through video mode (both of which I'll get to in the next section).
Gear VR isn't very large (198 x 116 x 90mm), nor is it very heavy (exact specs aren't available), and I wasn't ever uncomfortable wearing it. The padding around the eyes can be replaced easily, which Namkung calls a necessity for longtime users.