We recently stayed with 3 adults, and 3 school aged kids for 1 week at the Del Pacifico, and were very pleased with our experience.
Sam was easy to deal with, and sent us a lengthy welcome package with tips about the area, restaurants, activities, shopping, etc.
The condo was as advertised, it is very spacious and clean. The kitchen is well stocked, and there was ample bedding, bath towels & beach/pool towels. Sometimes we had the pool all to ourselves, or sometimes one other person/group would be there. It was never a problem as it a large pool deck and spacious pool - which is crazy warm!!
The staff on the grounds are very friendly and helpful, and the site felt very safe & secure.
There isn't a lot in the immediate vicinity of the complex - the shopping plaza at the bottom of the hill has an ice cream shop, a couple restaurants and a small grocery store and the beach is a 5 min drive away. We drove in both directions to Quepos, Manuel Antonio, Rainmaker, Jaco and Hermosa - loads of different beaches and attractions.
The kids enjoyed the beach, but it is very strong water so no great for kids to swim in and there are rip tides so you have to watch them closely. Loads of surfers and it is huge, and does not get busy. Loads of shells to collect :)
A few little things - unlike other VRBO stays, there is NOTHING in the kitchen food wise, so you need to pick up coffee filters, salt/pepper/oil/etc. They did provide dish soap and laundry detergent which is very handy. There was also no sheets for the oven ... but I suspect I was the first person to use the oven :) There is a BBQ, the outdoor patio isn't the prettiest, but it is clean and functional, if lacking in ambiance.