It's no deterrent at all if it is visible to a POS bike thief. They are way smarter in stealing bikes than you are at protecting them. When the alarm can't be seen it stands an actual (slim) chance of protecting your bike. When visible it's just a toy to haul around to talk about. Like using a condom with a hole in it.$10,000? Someone's $1,000 bike may mean more to them than your $10,000 bike does to you, I have the same alarm as ChezCheese and think it's a good deterrent. Nothing will stop someone who really wants your $10,000 bike, lots of videos to prove that.