Since Iíve had the arrows. I was lucky enough the other day to have a 550 km play with a solo 2. All I can say my cell phone set the Ka off, so it's hard to tell how well it detected cops or not...... But what I did notice was when the S2 alerted I was at a lost to know where and what it was. I felt a bit naked really. To tell the truth even if bell or whistler sold a better detector than the V1 I would alwaly's go the V1 just for the arrows.