So far I am liking their travel portal. Have found quite a few "mistake rates". One hotel (Mexico AI) that I booked is shown sold out on all other websites, including their own, but was able to book it on C1 site for $647 total for 7 nights. When it is available on other websites, it is running over 3k for 7 nights. Worrisome thing is that it is my back up booking for another hotel that is not nearly as nice, and costs more, but I enjoy the location. The booking for it was kind of hinky, so I was searching for a back up and found the deal on C1. Now I have to get a back up for my back up.