Almost every simulator is bordering on useless for normal (rapid) dev because each time you launch it you need to spend ages making it the right size and changing the window sizes. This means for quick testing I am stuck using the nexus 1 and iphone 3gs, because their resolutions fit my screen without messing around. I still have to move it to the right place each time.
A great fix would be the simulators always appear in the position/zoom you left them in. Also why cant we reuse the same simulator ? Once over this was super fast compared to Android, but now id say if you have to quit and relaunch every single time, then maneuver the window then it is no longer faster than android dev, where the emulator can be reused.
I will write my own skin if you can specify zoom, position and window size. I think we spoke of this before and it was something to do with windows losing the prefs or something. But it would be a very good fix to make this feel better for windows users I think.