Very good introduction to TDD, Luka gave us some experience going through an example using TDD, I feel like I learned a lot and can't wait to try it at work. The only thing was that sometimes I couldn't listen to all the explanations because it was required to write a lot of boilerplate code, I would suggest cutting the amount of boilerplate code the attendees write, limiting it only to the fun part (writing the logic).
Very good testing primer with a challenging example codebase. Luka obviously knows his stuff and is comfortable in front of the group.
The workshop was a nice mix. First a wider, high level approach, then a deeper, low level approach. I would have liked to see and hear more about tests and confidence; run tests often to make sure you *stay* on the path, and not just back to the path often.
To make this a 5/5 for me, polish it up more and send the audience off with homework to keep them on the testing path.