Just to give another perspective: I'm not sure on which OS you had those issues, but I'm successfully using Ghost.py on Ubuntu and OS/X. On OS/X it was harder to install PyQT and sometimes there were weird issues, but on Ubuntu it all went smooth.

By now I've ran it on thousands of different websites with little issues. It's true that I'm "recycling" the processes after ~10 sites, but that's mainly because of memory leaks.

EDIT: and to clarify on Ubuntu installing either PyQT or PySide (Ghost.py now supports both) was as easy as apt-get install...