Reasons to BuyExcellent 4K videoOptional color night vision videosComprehensive, easy to use softwareGood audioReasons to AvoidCan log in from only one device at a timeWeb portal requires Adobe Flash:Expensive Check AmazonCheck Walmart?Not only do the Arlo Ultra’s 4K cameras deliver the best quality we’ve seen from a wireless security camera, but it also uses that extra resolution to enable digital track and zoom, which makes it easier to follow and ID a person as they move across the frame. A built in spotlight also enables color recording at night, and it has dual microphones for better audio. Plus, the Arlo Ultra’s base station will be compatible with the company’s smart home security kit, due out later this year. All of this will cost you, though: A single camera with the hub is $399, and extra cameras are $299 each. And if you want to save 4K videos, it’s an extra $1. 99 per camera per month, on top of the $9. 99 monthly plan, the latter of which is waived for the first year. The Nest Cam Indoor is the third generation of the celebrated Dropcam, and bumps up its predecessors' video quality to 1080p. It's easy to set up and, thanks to its magnetic, swiveling base,it can be installed almost anywhere indoors. The video looks sharp; night vision is clear; the camera can be used as an intercom; and it interacts with the Nest Thermostat and the Nest Protect smoke detector, as well as numerous third party smart home devices. But to really make use of the camera's features, you'll have to shell out $10 or more per month for the Nest Aware program, which gives you access to cloud storage, person detection and customizable activity zones.