I usually go for the Drive Thru and its pretty fast, The only problem I've ever had was once through the drive thru I asked to use a rewards drinks and they charged me anyway...You have to say it twice, when you order and when you're at the window to pay.
I also love the new app, I go t grab and I'm out. BUT the app drinks aren't where youd usually pick up youre drinks, its on the other side near the wall.
My drinks are always perfect and how I ordered them, Never had a problem with the app at any store.