I played around to see what was available without actually booking anything, it made me feel more comfortable with the system.
The night before my ADR window opened, I had a tab opened for each ADR I wanted and put in the date, time and restaurant for each one. Once my window opened, I just refreshed the page and had to put the date in again, but it worked well and I saved time I think. I put them in order of importance- for example, I had a tab for BOG dinner near the end of my trip before everything else. I am going in late Feb/early March and got everything I wanted, just not all at my preferred times. We are going to MK on the second and 6th days of our trips and I could only get 4:30 and 4:35 for Liberty Tree Tavern and BOG dinners for those days. I would have preferred 5 or 5:30, but will probably keep those times since they aren't that far off, and an earlier dinner might mean we get seated quicker so the meal itself takes less time out of our day!