How bad is ScriptUI in Bridge?

So far, I have:

1. an edittext which does not scroll
2. non-supported multi-column listbox
3. ok/cancel elements have to be w.close() manually , and by association:
4. w.show() doesn't return 2, so flag variables have to be manually set and a return statement has to be put in after a w.show() line in a function to determine if cancelled or 'ok' was pressed.