Rene was our guide and was informative and excellent. He picked us up at our hotel and drove us around to different sites in the city. We went to the tower of Americas, drove around uptown area, stopped at Alamo, went on riverboat tour and the last stop was the cathedral which we didn't do since we were right near our hotel when we got off the river cruise.
I always enjoy these tours as you learn more about the city and see things and learn more than just walking around on your own.
I would say my favorite part was the riverboat cruise. Our guide was very informative, weather was great, and great scenery.