Yes, we booked through them for Cabana Bay in May. It was great. Their rate was cheaper than any other I could find, including the AP rate. The only difference I experienced was that I had to pay to pay the reservation in full when I booked, rather than pay the balance at the hotel. I actually prefer to have that paid for and out of the way ahead of time, so that didn't bother me.
No problems at all booking through
Undercover Tourist, and I wouldn't hesitate to use them again for a hotel booking.