I find the website easier, but it tends to crash more in my experience, so have both ready. Prioritize your ADRs to try for the most popular first, like BOG, CRT, Ohana, etc. It is sometimes easier to get those later in your week if you have a longer trip. And if you don't get something, book a second choice, and then keep trying - many things open up as trips get closer and people firm up plans. There is also a Cancelled ADR thread on here for each month that you can watch, and Touring Plans Reservation finder you can sign up for for free to look for ones you need. You can usually get most everything you need by the time you get there if you keep checking!