usability, portability, price, size, battery

reliability, image quality

90% of the reviews on Amazon.co.uk give this product a positive rating.

usability, portability, size, price, design

reliability, memory, viewfinder

82% of the reviews on Amazon.com give this product a positive rating.

Small and tough ; Water resistant without a case ; Decent battery life ; Solid audio capture

Video quality not as good as Hero4 Silver ; Battery not removable

Minimal size and weight ; Low-profile mounting options ; One-touch operation ; Excellent video quality

Very expensive compared with rivals ; App needed to adjust most settings ; Slow to respond with some MicroSD cards

Stripped down to the basics, the Session is the smallest and lightest GoPro yet. The streamlined design makes for easier mounting and operation, and video quality is as good as ever, but the high price is hard to justify.

The new GoPro Hero4 range is very impressive and offers plenty to those who are already users of the camera as well as to newcomers alike.

Tiny, sturdy and waterproof ; One-button operation ; Good video and photo quality

Expensive ; No screen

The best tiny action cam? We think so

The GoPro Hero4 Session addresses the main design sticking points with previous GoPro cameras: It's smaller, lighter and waterproof without a housing; the new shape allows for more flexible mounting; it's fast to start/stop recording; and its new mic...

The built-in battery means no swapping out for a fresh pack to keep shooting. It needs to be wirelessly connected to Android/iOS device or GoPro remote (not included) to change settings.

GoPro sheds its housing for the Hero4 Session, an excellent POV camera that's ready to capture what the day brings -- in or out of the water -- at the press of a button.

At first glance, you'll be surprised at how small the Hero4 Session is. It's at least half the size of its Hero4 Black sibling, and weighs even less, yet still manages to pack in enough tech gusto to record great videos. GoPro's cameras are already...

The Session is looking like one of the best GoPro models yet, and it looks like it's the future for the company too - but that's also a problem for this model. Its video quality, while great for its size, suffers from exactly that too. It's not as...

As the smallest, tiniest GoPro in the range, this should be on your shopping list if you really need an action cam you can literally put anywhere, as it won't weigh you down and your only concern will be about losing it. The video quality is not as...

Ultra tiny size ; Completely sealed waterproof design ; Excellent video quality ; Fast, single-button recording ; Better sound from underwater

Non-removable battery ; No 4K video recording ; Requires Class 10 or UHS-1 microSD card speed ; Doesn't work with capacities higher than 128GB;

The GoPro Hero 4 Session is what all future GoPros will look like: tiny, completely waterproof without any extra casing and terrific sounding.