The other morning I woke up at 5:50 on day 180 to make my 7 ADRs for our May 8th trip. I was planning to make a 7:00 ADR at TRex for night one of our vacation...I had it all mapped out where we were going which nights and what specific time we wanted to be there. Of course, as luck would have it, I encountered a problem immediately! The only time availability was being shown for TRex was 9:00 at night! I panicked, and had to put something else in its place, thereby mixing up all of our ADRs! I called right at 7:00 and the woman told me to call TRex directly. She said they aren't owned by Disney and only release a small number of ADRs to the Disney Dining Plan. Sure enough, I called at 10:30 that am, and I was able to secure the 7:00 pm ADR I wanted to begin with. So, if you are trying to make an ADR for TRex, you might want to call them directly if you are not able to book online. Had the woman on the phone not suggested I do so, I would have assumed that they were totally booked and not gone....Just something to keep in mind!