Nest's first video doorbell doubles as a security camera. The HDR video looks great, and the 4:3 aspect ratio combined with a 160-degree field-of-view means you can get a full look at your guest before opening the door. We recommend getting the Nest Aware subscription, which unlocks continuous 24/7 live video recording, at least five days' worth of archives, and face recognition. The Hello is especially useful if you have other Google or Nest products in your home.