OK
I'm not impressed and wouldn't want a 19 year old as my copilot. Flying is like cooking...you can throw something in the microwave and eat it, or you can slowly cook something adding spices along the way to make something outstanding.
You learn in many ways how to be a pilot. Even Lindbergh said the only way to know how to fly was to teach others how to fly.
Did the 19 year old ever teach?
It is probably easier to get a type rating commercial ticket in a 737 than to get an instrument rating in a Seminole. And a copilot check in a 737 is even easier than a type rating.
I wonder what spice (read seasoning) has been left out of this person's experience? Maybe not checking the compass against runway on lineup? Maybe a "too cool for school" attitude?
I wish this person safe flying...and maybe go back to the cook book once in awhile!