Comment 179 for bug 852190

Unfortunately, despite the fixes, it doesn't work very well at all. If you have time to wait a couple of more years, may be the driver will get there, and may be not.
Meanwhile, Realtek has an updated driver for us, good for kernel 3.9:
http://www.realtek.com/downloads/downloadsView.aspx?Langid=1&PNid=48&PFid=48&Level=5&Conn=4&DownTypeID=3&GetDown=false&Downloads=true#RTL8192CU
There is also a pached driver to install on 3.8:
https://code.google.com/p/realtek-8188cus-wireless-drivers-3444749-ubuntu-1304/