We took Go Port both ways for our cruise on the Mariner of the Seas - 6/18/22.
Our Orlando airport shuttle dropped us off right at the bus, went into the terminal to check in, got on the bus, and headed to Port Canaveral.
Coming back, we got off the boat around 8:45, got on the bus and we pulled into MCO at 10am.
We might have gotten lucky having the bus there and ready both ways.
Worked well of us, and would not hesitate to use them again.