I've been using a lot of booking websites, and I've never had such a bad experience as with Orbitz.
What happened:
I booked a car from their site, and the website needed to be refreshed, so I refreshed the page and went back to the car that I wanted and booked it however, what I didn't realize is that my start and end dates for the rental changed when the page refreshed.
Why are they so bad:
1) First and foremost, their customer service/support is terrible and rude! When reaching about my issue, instead of feeling or at least saying that they feel sorry about your bad experience, they just say, "Thanks for chatting with us — take care and have a wonderful day." When I asked for a copy of the chat, they told me to take screenshots of it when I asked if they could do it, they simply ended the chat.
2) When asked for a refund, they say that the car rental company doesn't offer a refund, but I see a charge from Orbitz and not from the rental company, and they don't want to give me a full refund even though it was an error from their site since it changed the dates on a refresh. They're blaming it on the car rental company, but I see a charge from them! Every professional company will offer you a full refund for an error that occurred on their end, EXCEPT Orbitz.