Pros
The general work environment was well-structured. You knew what was expected and you did it. They give proper training. Not that it's a hard job, but you didnt have to figure it out on your own. Accessible management. There was always someone in management around to help in a pinch.
Cons
Ridiculous rules. My store had a rule where you had to say "hello, can I help you?" or something like that to every customer you make eye contact with. So, of course, every employee on the floor would purposefully walk quickly and ignore every customer. And that was just one of the rules they had that negatively impacted how you'd interact with customers. Working as a barista at Starbucks, they wouldnt let us accept tips. At least 3 times a day I got in a tiff with a customer just to get them to keep their money. Union dues were expensive. Working 15 hours a week, I had to pay 45 dollars per month for a bunch of benifits that hardly applied to my city. Little room to be promoted. Most people worked for years and years before seeing a pay raise, and even then only once they got promoted to something different. They posted the schedule only two days before it came into effect. It was hard to plan anything without having to ask for it off several weeks in advance.