I booked a reservation with Reservations.com and cancelled it 2 hours later. They charged my credit $14.99 for cancelling. Don't use them. It's a scam. Not only that their website doesn't allow you to input the number of guests. It automatically assumes 1 guest only. So when you call them and tell them you want the reservations for 2 guests, they advise that it will cost more. Again, a brilliant scam on their part to get money for absolutely nothing. This company is a money making machine by scamming people.
If you have to cancel a trip with Hotwire.com forget it! Once they have your money you and you have to cancel the trip, forge it, you will not be able to get through by calling them and they won't answer any emails you send them. It's a scam, a disgusting, money grabbing rip off. Shame on them, shame on you if you book with them after reading this warning!