We cannot recommend Sandra highly enough. She was knowledgeable, friendly, prompt, and able to pace the tour to fit our needs. We had a great, fun, full day seeing the Pena Palace and Cascais. She recommended great ideas for our free time during the day. It was WELL worth the money! Skipping the line and being the first at Pena Palace is the only way to go. We got great insights from Sandra and fabulous pictures without other tourists in the shots.