They will tell you that a ride from the airport is $45, but then they add tax and a 25% tip. Tip is optional, and they cannot legally add that extra money to the bill. In addition, no other cabs, including yellow cabs, charge tax. When confronted that this is a scam, they become belligerent and yell loudly. Avoid this at all costs.
Cons: Illegal, ripoff, scam