I booked a private full day tour with Gems several months in advance in order to secure the date that we wanted. They required a deposit on the tour, which we paid through paypal. Two weeks before our departure I emailed the company (by responding to the email which was used to make the reservation) to confirm our tour. No one ever responded, so I sent 3 more emails, "Hey, I'm just trying to confirm our tour for this date and time..." I never received any response. And unfortunately I found that you can't get a refund through paypal after 30 days. In the end we found a higher rated tour company on TA a few days before we arrived and they didn't require any advance payment. Stay away from anyone like this who requires you to pay in advance.