I tried to recently redeem points for a oneway trip for two days. I could not book this online and i did this via phone. So the agent confirmed that it will be 3000 points and around $18 in taxes i have to pay. But to my surprise, I noticed that 6000 points have been deducted. I called them again and agent told they will reinstate 3000 points back. And again to my surprise , they have reinstated all my 6000 points back. And my reservation was still showing my estimated bill around $18. And another surprise when i actually took the car. When they handed me over the hard copy estimate while picking up the car, it showed $0. And that's what I paid while I returned the car. 0$ and no points deducted. But I waited around 3-4 hours on the call while booking and rebooking.