I use MAC filtering on top of that. Still not totally hack-proof, but it provides an extra layer.
Don't want to shoot you down, but from what I've read while recently getting up to speed to set up a wifi network of my own, MAC filtering is so easily overcome by spoofing that its literally not worth the time to implement it. Its _is_ an extra layer of security, but kind of on same level as a screen door is a layer. :-/
I'm sorry to say both MAC address filters and SSID hiding can be easily spoofed or exposed.