Not at all. It is cheap for a round trip to Puerto Morelos. OP was quoted $48 per person or $96 for two - and I am not even sure if that was round trip.

Entertainment-plus cost for a round trip to Cancun's hotel zone for 1 to 3 is just $55.

This is a private car or van, not shared transportation. It will be waiting for you at the airport even if your flight is hours late or the customs' lines long and slow moving.

Show me something cheaper for three (into Cancun there is a $50 round trip for two). And this is a company that has been there for years and is well recommended.