Ilian had thorough expertise in all aspects of the course material, and taught us the content in an engaging way. He was able to address all questions raised by the class, and gave us extensive background, context, and best-practice recommendations. He even went above and beyond the course itself by giving some general recommendations for real-world configuration scenarios raised by students. Ilian's expertise and approach made up for some weaknesses in the course that would have been a bigger issue if the instructor was less skilled. I could not have asked for a better instructor. I would be thrilled to have Ilian as an instructor for another course in the future, and I would be very lucky to have him as a colleague or a consultant for Palo Alto technologies in my organization.