When the driver is installed correctly, it is reasonably stable. It rarely crashes the OS, but if the signal is weak, the driver may disconnect and require you to unplug and replug the USB dongle to reset it.
If you encounter any issues with the driver or the wireless connection, you can try the following: driver realtek rtl8188ftv wireless lan 80211n usb 20 full
The RTL8188FTV is a budget 802.11n chip. You won't get Gigabit speeds, but you can maximize its potential. When the driver is installed correctly, it is