If you like high quality Italian food as I do (I guess you realized that a long time ago already), then you really need to visit Quattro located in the Four Seasons Houston hotel where I, by the way, never spent a night in.
When I stay more than one week in gorgeous downtown Houston, I will have dinner there as the food quality is meeting high standards. I could talk a lot about their lasagna and gaspacho as those two are their classics and must eat.
If you want to talk about déco, atmosphere of the place, you will for sure feel special and enjoy the luxury of this space and how it integrates into the Four Seasons look & feel.
I would highly recommend the place if you are into Italian gastronomy and want to enjoy a great environment with a nice service.