Could not recommend a better theme for extensibility and support.
Out of the box, the theme looks great and is an amazing upgrade to your panel. Highly configurable without needing to change panel code, and if you do, the code they've already written is very legible.
The people doing their support are responsive, kind, knowledgeable, and more than willing to help.
Not to mention, installing this on a fresh panel as mentioned is incredibly easy and well documented. Their integration for Blueprint works flawlessly in my experience, and with some updates it will be even better.
Definitely recommend the purchase.