Doug was fantastic, as always. The guy has boundless energy and is always interested in helping, both in the field and through his interactive teaching style in the classroom. Lectures felt more like a conversation with the whole class participating. Hey keyed in on where each individual was having trouble, and was able to help people with specific issues, without dragging the rest of the class through repeat information if others already knew more about a particular topic. There were several of his lectures that I'd heard prior, but each was improved upon from the last time I'd heard it, and I learned more each time either from the lecture or from the class discussion during/about it.