While it sounds like you had a great experience, I question your decision to
go and fly with someone you didn't know at all. Personally, I never would
fly with anyone unless they had a reputation as a cautious and safe pilot,
and had a well maintained airplane. I would never fly with a stranger in an
unknown airplane.

It can generate behavior like: the airplane can do six vertical rolls (even
though I've never tried it before), or "watch how the spin recovery is easy
(even though I've never spun the plane before), or "let's do a high speed
pass down the runway and show everyone what the plane can do!" Famous last
words are :"let me show you this!"

In general people (including myself) are proud of their new shiny toys, and
like to show people what the airplane can do, even if it exceeds their own
skills, experience, or common sense. It's a perfect formula for an accident.

Just a thought.