Tour guide was knowledgeable and effortlessly bilingual (English and Spanish / ingles y español. Bus was prompt and the waiting area for the tour was well air-conditioned, had its own cafeteria, and was decked out in Texas swag. I would recommend! Especially if you don't have a rental car, the Space Center is a pain to get to from center city, and the City Tour + Space Center tour is a great deal that handles all transportation for you.