Nice city tour guide, the Nasa Space Center Houston is worth it to see it for sure if you pass by HOUSTON :)
According to the website there was no provision for hotel pick up yet when I talked to other travellers, I discovered they were picked up from their hotel not far from mine. My pick up was at a large downtown hotel cost me 50 for the taxi from my hotel, who did not seem to know what side of the hotel I would be picked up from, the bus was late so I was beginning to think I would not be picked up, and the bus broke down on the way to the Space Centre. On the positive side, the staff were friendly, helpful and tried their best to make the best of a difficult situation.
I gave it a five because Im a space enthusiast and NASA Space Centre was amazing. As for the tour of Houston, I wasnt so impressed. It was early morning, we were the only ones on the bus and the young man giving the talk really sounded like he didnt want to be there. Our driver for the space centre drive was, however, very personable, informative and helpful. The space centre I would highly recommend.