I have the opportunity to snag a Z10 still sealed in box for $100. Not that I need another phone... lol. But it seems like a good deal. I already passed on one awhile ago. So few questions maybe someone can give some input on. First is how does the latest Blackberry OS compare to Windows Phone 8.1 (what I'm currently on)?. Secondly is app availability worse, better or the same as WP? Lastly how does the Z10 compare to the Lumia 635 overall? Seems like most places are painting a bad picture of Rim overall lately as a company on its way out. Thanks for any input.