Work experience is nigh on pointless in 90% of cases, either you don't get any training so you can't be involved in anything complex and so spend all your time doing chores, or you get something that could hardly be called a true experience of real world work
I was quite lucky, I got in at a small (3 man) accounting firm. They knew little about computers so I sorted quite a bunch out for them, but then I also did large amounts of filing which was kinda dull, but yeah, if I ever get an office job (I certainly hope not) I have learnt how to put thing into draws efficiently.
My younger brother went too his and they told him that they didn't really think it was worth it, so he could have the time off.