Pros
It's not a ton of work. You stand at the register, greet customers politely, ask them if they've found everything, scan their stuff as quickly as possible, get them paid out, and send them on their way. As a cashier, they rarely, if ever, ask you to do anything outside of your job description (you never have to mop or sweep). Keep your station clean, and keep busy-looking if it's slow. Otherwise, it's great. At my location, everyone is really nice. We're not all best friends or anything culty, but everyone is polite. It's also really easy to get time off as long as you're the first one on the board (just know ahead of time exactly what days you need off, and ask as quickly as possible).
Cons
The point-system really sucks. I called out because I had been in the emergency room the night before and had a doctor's note stating that I couldn't work for 72 hours (I was on some powerful drugs), and they still counted it against my points, and it almost led to me getting fired. It doesn't seem fair because it wasn't optional or pre-planned. I had a legitimate emergency and it racked up my points for a bogus reason. Also, sometimes customers are weird and tell you their entire life stories or sort of awkwardly sexually harass you. It's not that bad because you can just ignore them and get them checked out quickly. No one can touch you from behind the register, and there are cameras everywhere.