Pros
Discount, flexibility, and night shift opportunity for students. Working nights can be fun - the store is closed and you can do your job at your pace. We almost always had opportunity to work more hours. Management sometimes provided free dinner / snacks to night employees.
Cons
Not much by way of promotion availability. It's retail - you generally have to work with some pretty uncompetent peers who make the same blanket wage as you do. Holidays are almost mandatory. Generally, you couldn't do your work and go home. You were always asked to help someone else in their area to complete the job- many "milked" the hourly clock and therefore took 4 hours to do a job that should've took one - understandable from one perspective given it was the only job they had to pay their bills.