I had an FAA guy show up for a type ride last year. It did make the ride more stressful, but it was self induced. Overall, it went well, and I passed. During the debrief, the evaluator critiqued the type ride for about 5-10 minutes.

Then the FAA inspector and I discussed general airline and safety topics for about 30 minutes. I learned a lot from this informative discussion. The FAA inspector was friendly, helpful, and professional.