I like the ui designer: it's simple and works fine for simple projects.
I've just finished clarifying cryptic, vague and ambiguous specs by
building a UI prototype in no time alonside the client. A bliss. A
pleasure. A real pleasure.
Problem: the real stuff will need a lot of data binding, and validation.
I looked into JGoodies binding and validation framerwork. My heart
started pounding; my lungs couldn't find enough air... no more pleasure
in that direction.
I'd like JetBrains to show a little more faith in this tool, and push it
further. We couldn't we build UI based apps with pleasure. That may even
help you lock-in clients, even if that sounds politically incorrect.