It's hard to pick a review category, since of note are:
- Design quality,
- Customer support, and
- Documentation quality.
The documentation alone shows how much the author puts into his work. When you buy relatively expensive plug-ins bundles for instance where you don't even get explanations how to implement them, and much less sometimes even no working example, this theme's doc is absolutely fantastic.
Likewise the support - fast, efficient, friendly, and to the point.
On both counts could a few authors learn from.
And of course, the them itself is wonderful - full of power as is, and so easily extended/modified.
Great job, and great author.