Has anyone tried out these wall hangers?

Thanks Brad, but what I need is a locking hanger like the Hercules... an active device that automatically closes and stays closed until you lift the guitar off. I just don't want to worry about guitars shaking off in an earthquake.

I originally used Off The Wall guitar hangers which have a triangular mounting hole arrangement like a few of the Hercules models. (Hercules also has a model with a vertical wood mounting block). The Off The Wall hangers have two different width swinging cradles (one for average width nuts and a wide version for basses & classicals). The cradles are removable and interchangable on the wall-mounted base. When the Hercules hangers came out, I started changing over for the added security that they offered.

These new Fender hangers appear to be a streamlined take on the Hercules idea. It also appears that there is a supplied bracket/mounting-screw cover which could be painted to match the wall. Just looking for security, convenience, and someting that blends in as much as possible to the decor when not in use (wife-friendly). I was hoping that someone here had tried them. 

Noah, 2 things

a) I use the string swings, and there is no possible way a guitar would come out of them in an earthquake. They have big rubber ends that keep the guitar from sliding out. I'd be more suspect to the cheap plastic hangers with these cheap plastic mechanisms over the string swing's metal and rubber construction. 

b) use a mounting board. attach it to the studs, then you can attach whatever hangers you want wherever you want them. I use 2 rows of 1x6 boards. Here's a pic: http://sphotos-a.xx.fbcdn.net/hphotos-ash4/339986_10150269040593175...

Here's a photo of the String Swing with the rubber stoppers in place.  Ebay has lots of photos showing the guitar held securely in place with the stoppers in place.