Pros
The staff discount was of great use for myself, family and friends. 25% off after several weeks work is a good discount. A straightforward job where you knew at the start of the shift where you were working (e.g. children's department) and after a few shifts knew what associated tasks were for that day (e.g. stock takes, sales, clearing up etc).
Cons
They make you work the sales. The night before and the first two days of the sale you have to work and at no extra pay. The night before I was in until after 11pm (being over 18 they can make you work late). Luckily I didn't have the dreaded 6am shift, those who did left the store at 11:30pm with myself had a raw deal I felt. Sales are manic, but keep your head and you'll be fine on that level.