Yup, love Qt, have been using it since v. 4 for personal stuff, and in the past couple years worked on a cross-platform native GUI app that used Qt professional

Yup, love Qt, have been using it since v. 4 for personal stuff, and in the past couple years worked on a cross-platform native GUI app that used Qt professionally. I'd advise anyone using it to stay away from playing with the stylesheets to customize the look and feel of controls. If you do, you're in for a world of pain, and will shed blood and tears trying to get the app to look consistent and presentable across platforms. Given that cross-platform development is already hard as it is, you don't need that additional difficulty.