I was going to an area where parking could be expensive. The hotel I chose stated as amenities free parking and free internet. I figured that was worth potentially $30 or more, so I didn't bother doing NYOP. Even if it was cheaper, I might not get the amenities.

I got to the hotel, they looked at me like I was crazy when I told them I was promised free parking and free internet. They charged me for both, I have a complaint going with Priceline. It will be interesting to see what Priceline does (if they don't pay me back what I had to pay for parking and internet I will try a chargeback with the credit card company.)