Pros
The tips, everyone's favorite. The company may tax you on those tips, but your local store will most likely find ways to minimize it by claiming you only made a buck or two. This essentially raises your wages. Personally, a Pros for me was the fact that it was a coffee place, and I love coffee. The smell of the store, the young college girls, the free coffee, and my night shift was quite eventful.
Cons
The process isn't very methodical. The system varies with each other, but of the 4 different locations I worked at... the cashier at drive-thru had little to no knowledge of what was being passed to them. Company policy requires you to eat whatever food you make or take, at the store and not take it home. No big deal, but a cons. A common complaint is that the boiling hot coffee isn't hot enough. They prefer pure magma, apparently. Well there's no microwave to heat it, so the best compensation is to remake the coffee, but attempt to warm the cream first. The cream is what makes a coffee cold quickly, little tip for that inevitable situation. 2 of my locations were 24/7 and I was on the overnight shift. One of the locations I worked alone, which wasn't bad, after the first week. You get lots of regulars who are specific about their needs, and you have to juggle both counter and drive-thru. Like every drive-thru, you'll get people who feel the need to order huge feasts for their family, forgetting that it's sort of an "express" lane. They're paying $4 for a cheap poorly made unhealthy sandwich, so you owe it to them to put up with it.