recently i've been working on three separate sites built on kriesi themes, and I've really enjoyed using Christian's software. His code is clean and flexible to customize. His support staff is not only attentive, but also happy to assist you in defiling a kriesi template, to turn it in to something else. I'm a designer by trade; when it comes to building web sites I want to take the shortest route in wrapping my design over the bones of WordPress: The Avia Framework lets me build out pages the way my design intends.
Just wanted to say "gut gemacht" or whatever it is in Vienna. Thanks :)
Here are a couple sites I launched recently:
http://www.balletnj.org - Twicet (also its child site for their academy is in production)
http://www.mjvdesign.net - Corona, launched this morning, still stuffing it with content
And another in production using Brightbox.