This is the third or fourth time I use Uber in Amman.
Though the fee is high but for someone with no car and lack of reliable transportation system in Amman, Uber hand you a great service.
I took a long ride, outside amman, which I paid even less than what I pay for regular taxi. Not to mention that Uber cars are clean and smoke free.
Payment is done by credit card as known, but it would be great if Uber accepts credit card payments in Jordanian dinars not in USD.