engadget.com -this tech website completed reviews of the product, a fairly comprehensive look at the varoius features in the the operating system(O/S) and explains using them, with screenshots
[WHY - PROS]
As a replacement for older versions of BlackBerry OS, BB 10 is a huge step out of the dark ages of mobile OS design.
It's something that finally feels intended for a modern, full-touch device, yet
still offers the core productivity focus we think BBID-holders will like.
Does it have mainstream appeal? Yes, it does, but
we're not sure a great stock keyboard and some trick gestures are enough to unseat the current kings of mobile devices.
[WHY NOT - CONS]
] tardiness and
] limited selection of quality apps
] make it a bit of a hard sell for those already on iOS, Android or Windows Phone.