I worked there during the summer through an agency when I was at college and then full time for about 7 months in 2003 when I finished uni whilst I was looking for work. Wasn't that bad, at least it was double time on a Sunday and the people were friendly.
I've actually had to re-apply for part-time work there recently, as I've been made redundant. It seems to be quite a palava getting back in though. You now have to do a maths and english test before they decide if you are even suitable for an interview. That's a bit demoralising when you've already worked there and have a degree.
Had my test last Thursday and still haven't heard anything which is quite worrying.