As someone that has been using XF since it was in beta and gone through just about every style out there, I can confidently say this is the best dark theme available for the XF platform. No other style will give you the extensibility and options this one does and it's easy to make it uniquely yours in just a few hours. The support they give is nothing short of stellar; they've never hesitated to answer any of my questions even years down the road. You honestly can't go wrong with this style, so just buy it :)
As usual everything by ThemeHouse is amazing. @Mike Cruzer and @Jake B. are A+. UI.X 2 Dark is the fantastic companion to a fantastic style, a pair that we plan to use as we prepare for 2.1 because this is some of the best work that can be purchased on xenforo.com currently. As always, you've all outdone your selves.
This is basically the best style available in the xenforo ecosystem. I've been using it since XF1, and the XF2 version has all the same great options and customization that made the first version so easy to use. This made it easy to carry over my design when upgrading from XF1 to XF2. The design is easy to make your own, so don't be afraid that your site will look like others, with a little creative design on your part, this theme is really capable of being unique on just about any website.
I think the style is really good, it runs flawlessly and bugs are also quickly fixed, big praise to the team.
The only thing that really worries me is that fonts are loaded from outside, if you hadn't used these "Material Design Icons" but would have stayed with "Font Awesome" you would have been less annoyed/problems as an administrator.
Also from a security point of view it is always stupid if something is reloaded from outside.
I've been using the UI.X 2 (Dark) style for a few months, and I have been thoroughly enjoying it. Our WTF.com style is based on this style as a parent, and its been VERY flexible. ThemeHouse has been open to suggestions, and is active on their github (bug tracker) where I post bug reports whenever I find them. I'm looking forward to further enhancements going forward, and I always know I can get help from them should the need arise. Great job on the XF2 update guys! Now back to work! ;)
UI.X Dark 2 is simply amazing. I was able convert my custom style, which is built upon UI.X Dark 1.x, to UI.X Dark 2 in a just a couple hours. I still have a bit of tidying up to do, but achieving the overall vision could not have been easier or faster. The CSS I required in the extra template is so much smaller than before.