I'm not fond of those things. They defeat the pedestrian safe bumper, and they decrease approach angle. They can also fold into the hood, and do more damage then if it hadn't been in place. Make sure it has secure attach points other than just on the bottom (I can't tell from the picture), or it will shake/vibrate a bunch, and will easily fold into the bodywork on a slight impact.
I was thinking about picking it up... I saw this right after it was listed, and was hoping (against all odds) that nobody would notice.
Metuchen is a quick drive for me, about 40 minutes each way.
However, last night, some a$$hole in a pathfinder, with a very similar guard installed, managed to leave a wonderful dent in the driver's rear quarter of my SF (damage estimate is about $800) by trying to cut off the guy behind me in stop and go traffic. I WASN'T MOVING, and he kept inching closer and closer, and then it was too late.
Anyways, long story short - had he not had the damn thing installed, the damage would have been non-existent. Instead, i've got to go fight his insurance company (and I still haven't gotten the other damage sorted from when I got hit by a cab)
So, big thumbs down for these things. I'd say you should only get one if you need to protect your headlights, and don't care about ground clearance.