I have no idea what these other reviewers are talking about- sounds like people had a personal axe to grind. Dental treatments sometimes hurt! Especially if you've avoided the checkups for years before (ask me how I know!).
I've gone to Dr. G for many years-- and as I hinted, I'm super scared of dentists. She's got a great rapport with patients and you can tell that she really cares about their well-being. She's very youthful looking, but she plays down the fact that she's an Ivy League educated dentist that has trained for years before deciding to settle in Houston.
I haven't had anything but an exam and a cleaning-- I don't have caps or veneers. But I wouldn't hesitate to recommend Dr. G to any of my friends-- and have!