I did (read: tried to do) my cert 3 in childrens services through them, it was a traineeship and was done entirely by corrospondance (sp?). So a bit different, but I had a very similar experience to the pp. The teacher was supposed to come out once a month to collect my assessments and go through the next module with me but over a 12month period I saw her twice. Anytime I tried to call I got the message bank and she never called back.
Because of that I had trouble getting another traineeship, apparently it was my fault I didn't finish enough modules in the 12 months and didn't meet the deadlines set out in the initial meeting.

Good luck with it, I hope you have a better experience than I did.