This phone is DOA. One has to wonder why if this is such a good idea, why none of the other phone makers thought about it before?
All the current phone manufacturers see Apple making billions from producing the same old shaped slab with the screen on the front and a little button and decide to do the same thing and look how that is working out. It is a race to the bottom. The Samsung S5 was a failure (S4 owner here btw) and the Note 4 doesn't seem to offer anything than the Note 3 didn't. HTC and other firms are barely making profit on these things. At least if Blackberry are gonna go under they will go down fighting.
Maybe because, the vast majority of usability studies show that most people like a phone they can pocket, or they can easily slip into their pocket book.
There is a video on youtube where someone has helpfully compared it in size to other phones it might be considered with and it fits into pockets no problem. Maybe not skinny jeans, but that's not the target market here.
The best think BB could have done, was to continue their BB7 line, while BB10 catches on. By now BB7 devices would have cost $50 bucks, and would have help them retain a lot of customers who are now in the Apple and Android world and would never go back to BB.
I think Nokia have got the whole bottom of the market can't give them away market covered. BB7 is dead, but they should've done a QNX version of the bold design