I have been riding my tandem with Shimano WH-7801 tubeless wheels and Hutchinson Fusion 2 tubeless tires for over a year. I run 105 PSI in the front and between 100-105 PSI in the rear depending on the stoker. On my single I run about 90-95 with the same wheels.
The only flat I have had was a front flat that went down slowly over about 2 miles. We rode the final mile of the ride with a flat front (no tube with me) and had no issues.
Bit of a pain until you figure out mounting and how to keep them from weeping between rides. Once you get past that hurdle you will love them. You will not pinch flat again.
M12