Just wanted to know if anyone has any experience with Qt under Windows, Linux and/or Mac OS X? I've been evaluating this type of kit for cross-platform development in C and C++. I was initially thinking about wxWidgets, but every single UI Builder/Designer I've looked at for it stinks. That's putting it mildly. They're just terrible applications for UI design and not at all suited to be used by a designer while working in tandem with a coder. If anyone has ever used Interface Builder for Mac OS X, imagine it lacking just about everything that makes it any good.

Though wx is free and the designer applications cost very little, I've all but ruled it out already. Qt seems like it would cost at least US$5000 (3 platforms, Enterprise ediition), so I'm doing as much research before parting with any money (and will obviously make use of the evaluation period).

Bruno