The Houston Half Marathon is a flat and fast race. It's been run the same day as the marathon, so there are a lot of people cheering around the entire course. You run in city so there isn't really much to see, but people makes it fun!
The Expo is pretty big and there are a variety of brands participating.
The after party is nice and warm. There are table to sit down and enjoy your food/drink while chatting with your follow runners, much better than after parties in the North East!