I've been running a Stebel on my Vision for two years and the little plastic critter still makes a lot of racket every time I push the button. I agree that if you have time to hit the horn, you're better off taking corrective action, i.e. steer or brake. But when they are just flat not paying attention, it WILL wake them up.
I do have a Stebel and will be installing soon. My question is do I need the relay supplied with the Stebel, or can I place and connect using same wiring? Is not the OEM relay protected? I do know there are quite a few pieces needing removal to open the work space. Photos to come when I get the time.