If you have tuition covered my your company, Baldwin is a good school. But, the top schools are quite expensive on the island. Be aware that Baldwin will cost you about $15-16K the first year. The other two highly touted schools are St. John's and Robinson in Condado. St John's is about the same cost as Baldwin. Robinson is about $12K. Also in the Guaynabo area a well recognized school is Parkville, in the $11K range.Â
There are several other options if you do not have tuition covered by the company. These will be in the $5-$8K range. Some examples are Cupeyville, Rosa Bell, Academia San Ignacio (elementary, Jesuit, and Spanish), American Military Academy, St. Mary's, Wesleyan Academy, etc. The list could keep going, but can be narrowed down based on language and cost preferences.
All of these are in the San Juan, Guaynabo, Cupey area. I do not know much about the Dorado area schools though. If you are interested, there is a pretty active facebook group full of parents that live down here. It is a good resource for connecting with people once you arrive and finding information like dentists, doctors, schools, shopping etc.