I love the solvespace ui, yes it's weird and different but it works well and is internally consistent, except when a gtk dialog jumps out at you, that is jarring and breaks the flow.

I guess my point is. the obviously gtk bits of solvespace are it's worst parts, if I were a better ui programmer one of my goals would be to get rid of all the modal windows in solvespace, make them in line and operate like the rest of the native widgets.