My wife and I went on a Lisbon in One Day Historic Small Group Tour on September 25, 2018. Our English speaking Guide was very knowledge and knew Lisbon and Portuguese History pretty well. The van ride was also very comfortable.
She covered all aspects of Lisbon history and had the good patience to answer questions with a smile and a knowledgeable response.
That first day gave us an opportunity to focus on specific sites on subsequent days.
Strongly recommend this tour.