Great piece of hardware here. The entire outside is a lightweight metal that reminds me of magnesium, but I might be wrong. From pictures, I assumed that the ridged underside would be a glued-on rubber pad. Not the case. That' seems to be the same metal as the rest of the body. There are 2 rubber "strips" at the front and back to provide some grip, but most of the underside is metal (Good for heat dissipation, really neat design there).Thin laptops often have flimsy screens. When you go laptop shopping, test the screen for "flex". I don't like flex in my screens, and this passes with flying colors.The keyboard feels great. The trackpad is very responsive and works well. The click of the trackpad is a little on the loud side for my taste-- I wish it had been haptic feedback similar to the macbook pro.F keys are tricky. You can hold down the "application" button (where the caps lock lives) and use the top row as F1-F10. Need F11-F12? It's nowhere I could find on the support site. I had to start up a support chat to find that using the same application button combo, use the number keys F1-0 (F1-10) and then - = for F11 and 12. This works, but I don't like how hard I had to look to track down the info. I know that you can treat the top row as F keys by default as well, with the flip of a toggle in the settings.Chrome OS is good. I think it will get better. I'd like to see more of the trackpad gestures I learned to love on Macbooks. Three-finger-swipe to see virtual desktops would be a great start.