Ya they are cheap and don't take way from the look of the bike so good investment. They may have saved me in my situation because I doubt that deer knew I was coming and those whistles may have made him pause just long enough for me to get clear. Who knows but can't hurt having them on especially since there are lots of deer in my area.Ike, going to your fight with the deer. If you look on top of my lower, you can see my deer whistle. I have one on each side. About $8 at O'Riely's. I've seen the deer react to them but you can't predict what they will do after hearing them. Sometimes they freeze, sometimes they run. But for $8 I figure what have I got to loose.