I use the designer also. I don't see anything (mostly) when you open the ui in the designer as it's mostly layouts and subclassed widgets, but it still makes it easier for me to visualise things rather than typing code and hoping it works.

And it's weird, not wierd. Wierd is a programming language where you use a pattern of symbols resembling wires: http://c2.com/cgi/wiki?TheWierdLanguage