Having eaten here many times, I feel that I should write a review.
Part of the group that owns Houston's and Bandera, Hillstone is a wonderful place to dine (as are the others).
When the weather is accommodating, go to the patio because the chairs are comfy, service is great and a decent amount of food is available.
If you want to partake of their full menu, you will have to eat inside. Lovely ambience; perfect romantic lighting, excellent service and the food is always perfect (I have dined there over ten times in the past year or so). They have one of the best wine lists around, and hte servers know how to advise. Everything on the menu, from sushi to steaks, is always prepared just right. They have a kale and cashew salad which is out of this world!
The bar scene is always lively, and Al is one of the best bartenders around!
They have TONS of parking too!