I live here in Portugal and for the last couple of years have been meaning to take this tour but only got round to it last weekend when a friend, as interested as I, decided to go.
We met Sandra at the Castle/Convent and had the most amazing tour for 2 hours. Highly recommended as something to do in this incredibly important castle in the history of Knights Templar and the famous Navigator who through maps and knowledge made Portugal one of the most richest countries at that time.