They're in my apartment (I'm on the 4th floor), but I haven't gotten around to getting any sort of spotting device. So I never squat close to failure with them. I just use them for light to somewhat challenging squat and press workouts. I save my heavier attempts for the Olympic lifting gym, where I've never used spotting stands and have never seen anyone else use them either -- we just walk the barbell out into the open. People just ditch the barbell if need be or get a spot from other lifters.
I concur with Frank: knowing how to safely dump the weight is critical.