You should definitely use the b43 driver for the 14e4:4311 device. All you would
need to do is install the firmware.
The previous instructions missed one step. The command sequence should be:
sudo /usr/sbin/install_bcm43xx_firmware
sudo /sbin/modprobe -rv b43
sudo /sbin/modprobe -v b43
The main advantage of using b43 is that it will not break with each new kernel
update the way that happens with wl.