Zuma tours has taken us from SJO to Montezuma, by shuttle to Jaco and boat to Montezuma, and also by boat from Montezuma to Jaco, and also on a tour to Tortuga Island. We've also taken the shuttle from SJO to Montezuma and back via the ferry at Puntarenas with other companies. The boat is way better: faster, less expensive, less effort, more scenic. You do have to get your feet wet at Jaco and Montezuma beaches and get some sun on the trip, but they take care of getting your bags on and off the boat. My only reservation was that we were some minutes late getting off the Jaco beach, and the young men running the boat lacked some skills in handling the engine and gas, leading to some unplanned starts and stops that got me a little wet. The alternative, shuttle and ferry, was crowded, hot, at times uncertain, boring, along several bumpy roads, and required us to haul bags up and down stairs as part of a tedious line on the ferry.