I've now used the Quick-fit Pro for the last few days on the street. There are ways to get the lap belt tighter including raising the seat, I will just have to see what my headroom is like with a helmet.
Belt use is great, easy in and easy out. Convenience factor of being able to remove the belts in seconds is huge and the residual belt hook-ups are of no consequence and don't interfere with anything. So far so good, Road Atlanta test this coming weekend.