The aspect about cotton on is that it is incredibly flexible once you know the knowledge and the nook and crannys of the system. If you ever move, and need a job, you don't have to worry about relearning or being re-trained, you can simply apply or even be transferred to a CO group in your area.
That being said, the culture is very humble and friendly. I worked in Rubi and it was very sales-oriented, never the less it did help me advance my knowledge in retail.
However, the down side is that as a Christmas Casual, I didn't receive many shifts to begin with in the beginning (once a week) and it was just annoying as I only got three hours per shift.
50% discount, flexibility to work anywhere within the company, very contingent management
short hours for christmas casuals