Is everything working exactly as expected? No, not quite. Not yet, at least. The vast majority of the LTP passes and works well. But there are some imperfections still, especially around tty's an the vt100. My beloved byobu, screen, and tmux don't quite work yet, but they're getting close!
And while the current image is Ubuntu 14.04 LTS, we're expecting to see Ubuntu 16.04 LTS replacing Ubuntu 14.04 in the Windows Store very, very soon.
Finally, I imagine some of you -- long time Windows and Ubuntu users alike -- are still wondering, perhaps, "Why?!?" Having dedicated most of the past two decades of my career to free and open source software, this is an almost surreal endorsement by Microsoft on the importance of open source to developers. Indeed, what a fantastic opportunity to bridge the world of free and open source technology directly into any Windows 10 desktop on the planet. And what a wonderful vector into learning and using more Ubuntu and Linux in public clouds like Azure. From Microsoft's perspective, a variety of surveys and user studies have pointed to bash and Linux tools -- very specifically, Ubuntu -- be available in Windows, and without resource-heavy full virtualization.