"Philipp was well prepared, thoughtful, and engaged as a mentor. He offered both practical and guiding advice and counsel. I valued our time together. To provide constructive feedback, I would encourage that Philipp spend more time at the beginning of the call to ask about foundational elements of programming, what's in place, and what I tried before making recommendations. Another option would be to phrase suggestions as, "Have you tried X?" Otherwise, it was a fruitful discussion and I'm grateful to Philipp for his time. "