Pretty decent review of the Z30 over at Engadget.com.
BlackBerry Z30 review
Here is the conclusion for people who don't want to read the lengthy review:
"The BlackBerry Z30 has plenty of things going in its favor. It's well-designed, isn't cumbersome to hold and, despite its size, looks really stylish. Moreover, BlackBerry 10 is well-suited to a bigger display and the 5-incher here is a good one. So had the Z30 been the first BB10 device launched back in January, perhaps there would have been room for more optimism. We're always full of praise for devices with a strong battery and, while BlackBerry diehards will be annoyed that the cell isn't removable, a 13-hour intensive stint still means it should last for a full day of work or keep you entertained on a long-haul flight. However, we can't be universal in our praise because there are so many small things that add up to a frustrating experience. The constant crashes, middle-of-the-road camera and poor call quality erase much of the goodwill the handset has otherwise earned.
On one hand, the BlackBerry Z30 is the best BlackBerry 10 device yet, and if you're already a convert, this is the one we'd recommend. If you aren't a BlackBerry fan, however, then the situation's a little more nuanced. If you're looking to dump your Android, iOS or Windows Phone device in favor of the Z30, you have to ask yourself: Will you buy a device that really needs some urgent stability fixes -- not to mention the issues we've mentioned above? While we expect the Z30 to be cheaper in other territories, the �500 ($800) UK off-contract price will be another bitter pill for those looking to switch. The Z30 isn't a bad device by any means, just one that falls short of what we expect from a 2013-2014 flagship."