I bought the five camera system, but can only get four of the cameras to work. I have contacted Arlo/Netgear via the web based tech support, but the response has been painfully slow and the suggestions unhelpful. The cameras that are set up are working fine.

The Arlo Ultra represents some of the best outdoor security video that you'll find. The combination of 4K and HDR, good night vision and control over motion detection and the notifications you can receive all goes some way to justifying the lofty price.

Video quality is superb with 4K HDR; Lots of features; Easy mounting and installation; Works with wider Arlo system

High price; Needs subscriptions; Caveats on features; Mounting not secure; 4K live stream is hit and miss

If you fancy connecting everything at home to an app, you can now add a high-resolution surveillance camera to the list of changeable lights and other smart home items hooked up to the Net.

Sadly arlo have not developed a fix for activity zones. Hence they are non existent, I reported this to arlo for over 4 months but still no solution. Cameras recorded everything in view, batteries drained in five days. Check out the forum. This is a common problem.

Arlo Ultra simply is the best wireless security cameras you can get at the moment. It has 4K HDR recording support (local & cloud), great design, impressive operating temperature (-20 to 60 degree Celsius), and Smart AI features that can differentiate between people, animals, vehicles, and packages...

You've got numerous choices in connected some security cameras these days, but almost all of them require wires. Running a camera solely on batteries introduces a lot of uncertainty. Will it last long enough Will it wake up reliably

Video The 4K video is a huge step up from past Arlo cameras; It looks great and file sizes aren't enormous, Battery The battery will last a month or more on a charge, and it's more reliable than other battery-powered cameras, Local storage You can save all your recorded videos to a microSD card...

Price The $400 price tag for the single-camera kit is a bit outrageous when there are so many cheaper wired cameras; Speed While it's better than other wireless cameras; the Arlo Ultra still takes a few seconds to wake up; Local video restriction For some reason; you can only stream in 4K while on...

The Arlo range of security cameras has been a big success for Netgear in recent years -- so much so that the company decided to spin-off the Arlo division and float the new Arlo Technologies Inc. on the stock exchange last summer.

High-quality 4K video camera; with HDR; 180-degree panoramic video; with 12x digital zoom; Integrated spotlight and siren; Colour night-vision

Expensive; Requires subscription after 12 months; 4K online storage costs extra

With its teething problems now -- hopefully -- behind it, the Arlo Ultra proves to be an impressive and versatile security device. It's expensive, and might be a case of overkill for homes and small businesses that don't want to pay the premium subscription fees.

High-quality 4K video camera; with HDR; 180-degree panoramic video; with 12x digital zoom; Integrated spotlight and siren; Colour night-vision

Expensive; Requires subscription after 12 months; 4K online storage costs extra

The Arlo Ultra has its limitations, but if you're willing to spend the money you'll love the good image quality and smorgasbord of smart features.

Excellent image quality; Packed with features; Well-designed app

Expensive; Some features limit resolution

Bought a pack of these after reading mostly good reviews. It was horrendous. Would constantly disconnect. Wouldn't load. We couldn't even get it to work long enough for us to see if we were placing it in a good spot to then secure it. Returned and bought another brand which has been perfect!