The Acer C720 is similar in specs to other Chromebooks currently on the market. It's a Haswell architecture with a dual core Celeron, 2 GB of RAM, 16 GB flash, HDMI-out, 3 USB, webcam, Bluetooth, and a 1366x768 px screen. It's 0.8" tall, and weighs just 2.76 lbs. Its battery life is rated for 8.5 hours but in real world usage rated at about 7 hours. You can view its specs in detail here.
The laptop feels very light, sturdy and of a good build quality. Its keyboard is easy to get accustomed to, and I had no trouble at all, coming from a radically different keyboard design on the DELL. The ChromeOS function keys are really handy too, e.g. to change brightness, volume etc. The touchpad has the right size, position and responsiveness too.