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Pro Amazing display
The S7 Edge has a 5.5" 1440p Super-Amoled display. It has a very high resolution which means blocky text and grainy images are things of the past - it's got enough pixels that it will work great even as a VR (virtual reality) display. The Super-Amoled technology allows individual pixels to turn off, which means that black colors are true black (IPS panels need to keep black pixels illuminated which means that very dark blue glow you'll find on most screens when displaying black). Colors really pop as well.
Pro Great camera, especially in low-light
Samsung has reduced the resolution to 12MP (the S6 had 16MP), but they have changed the way the camera works. Each individual pixel is larger which allows more light to enter - this means brighter looking pictures even in very dark situations. They also use dual-pixel technology, which makes focusing laser fast. The camera also protrudes less from the back than the S6 (it just barely sticks out now).
Pro Comfortable design
The Galaxy S7 Edge has a curved screen on the front, as well as curved glass on the rear. The rear curve makes it groove into your hand better than regular corners on most phones. On the front of the screen, the edge invites you to swipe all the way to the side of the screen, and there are features that take advantage of this. Swiping in from the right edge brings up panels which you can customize - quick one-touch calling contacts, quick launching apps - you can configure it to whatever you want.
Pro Excellent performance
This is one of the first phones with the all new Snapdragon 820 system on a chip (SoC - that just means that there's a CPU and GPU bundled in the unit). It has the newest and most advanced CPU and GPU available in early 2016. It's accompanied by 4GB of RAM - that's enough for most laptops, so plenty of RAM as far as phones are concerned.
Pro Waterproof (with no flaps)
The Galaxy S7 Edge features IP68 dust and water resistance - you can submerge the S7 into 1.5m (5ft) of fresh water for 30 minutes without worrying about it. Just make sure to let the ports dry before using them.
Pro Good battery life
The 3,600mAh battery is large enough to last a full day, and Samsung boasts that you can binge watch an entire season of Game of Thrones without needing to charge (these claims have yet to be tested, but users are reporting 7 hours of screen-on time during mixed use which is still impressive).
Pro VR Compatible
The Galaxy S7 Edge is compatible with Samsung Gear VR. It costs $99, but sometimes can be bundled with the phone for less. It is a great affordable introduction to virtual reality, although it isn't the best solution available.
The phone clips into the headset, and connects via the USB port to act as the brains and display for the unit.
The Galaxy S7 runs TouchWiz software, which is known for its abundance of bloatware. Bloatware is the term used to describe pre-installed apps that add little to no functionality. Samsung's offerings (S-Voice, Chat-On, Flipboard, Kies, Samsung Hub, and the list goes on) are often inferior to Google's offerings and/or third party apps.
Con Slippery back
While it feels premium, it's more prone to damage than aluminum or plastic backs. Also, it feels fairly slippery meaning it's more likely to slide off surfaces.
Con No USB-C
Samsung opted out of using the next generation USB-C which is quickly becoming the industry standard and is a much more convenient reversible port.
Con Edges reduce usability slightly
Hitting the q and p keys on the keyboard is harder than on flat screens, as about 30% of the key is slanted away. Also, on white screens you can see the slight color distortion on the edges if you look for it, although in regular use you won't notice it.