Yup, what Bounce said. They used to (not sure if they still do, but I'm guessing so) give radar guns to law enforcement agencies for free. Then, if you get a speeding ticket, they automatically jack your rates, regardless of a previously clean record. Seems to me like a tire repair place throwing nails all over the road in front of their shop. Bounce also made a couple of more points I was unaware of, so I'm assuming they're still shady (tricky? conniving? sneaky?). No sir, I don't like it.
That being said, I'm sure there are many whom have had decent experiences with them. Make sure you ask questions before you commit.