The workers are almost always busy doing something, so it's definitely understandable if they can't get to you right away. The workers are super friendly and they always try to get the customized orders right (unlike many other smoothie places). There are a lot of complaints about the drive thru having a short line but taking forever, but please understand that this isn't McDonald's; it's not going to be as fast. Smoothies take a little more time to make, and sometimes it's more difficult for the workers when the car in front of you ordered multiple customized drinks. It's completely understandable for the drive thru to take longer; shout out to you, drive thru workers!
I still prefer to go in-store to get my smoothies and bowls. I'd rather get the bowls over the smoothies, though. The pitaya bowls are the best! The bowls are always presentable and super delicious on a hot day.