This was our first visit to Costa Rica and we thoroughly enjoyed our two week stay at Los Delfines. The condo was neat and clean, serving as a great home base for our explorations. We were able to walk to the beach and the development was very nice and well maintained. We had a couple of meals in the restaurant, which were good. The residents are very friendly, and we even made a few friends. We also enjoyed the surrounding areas - canopy tour in Montezuma, boat ride to Isla Tortuga, surfing at Mal Pais or Santa Teresa, local nature reserves (Curu) and the like. We would certainly recommend the condo for anyone interested in visiting the area. Mike was vey helpful and provided many tips for traveling to the area.
A couple of recommendations: The kitchen was not as well-appointed as other VRBOs (could use a better BBQ, a few good cutting knives, a few new pots/pans - one pot was missing it's handle -- a salad bowl). There was only one hand towel for two bathrooms, so we would recommend having a couple of additional hand towels. None of these drawbacks would cause us not to return to this rental, though. It was a good value for the price and we would recommend it to anyone visiting the area.
Additional advice: If you fly into San Jose (Alejuela) and decide to rent a car (and take the ferry to Paquera, then drive to Los Delfines - about 35 minutes), go to the super Wal-Mart or some store like Costco to stock up on basic food items/supplies, as the stores in the area are a little pricey and have limited selection.