Hey, look, we know the same DPE in the LAX Area
The one student I ran through him would take a violent disagreement with his checkride style, but there was a personality mismatch from the get-go. Apparently sneakily pulling an engine as the applicant was approaching a stall demonstration was not well received by my student, even though we had practiced it -- the student thought it was "off limits and dangerous" and it threw off his game for the rest of the ride.
It was an 8-hour day all-in for a Commercial ME add-on to single. 5 hours of oral.
He passed in the end. I learned a lot. The student has an enemy for life, and would probably kick Pat in the shin if he saw him in line at Starbucks. While I admire the trial-by-fire style, and I liked Pat as a person, it's hard to recommend him to others, since I don't want to get a referrer's share of any hatred after.
But, pass his ride and you're a good ME pilot, no question. If it's your twin, consider some sort of upholstery protection for the pilot seat, and expect tricks. You know, for that time in real life when you're at Vmc-10 and carrying power, decelerating, and you lose an engine...