I did this on Tuesday and it worked great. I had tabs up and ready for the restaurants I wanted, including CRT which was my most difficult one, and was able to get everything I wanted. However, as mentioned above, I did have to enter my credit card each time even though it was saved, which might have slowed things down. Later that day, I booked something on the app, and the process was much quicker and I didn't have to enter my card. But would it have worked as well when I was doing multiple reservations right when my time opened? I don't know.