I became a returning customer for work and travel when I came back to Australia for my second year visa.
The WTC fun week is the best way to be thrown straight into the must do activities in Sydney with a big group of new friends. It gets you ticking things from your to-do list from day one. Nearly six months later I'm still in touch with most of my fun week group and I'm even living with some of them (we get noise complaints every night).
Probably the first (but not last) great night out I had in Sydney this year was the WTC pub crawl. I really didn't expect to be part of at least 30-40 people cramming into each place. It really set the pace for my working holiday so far.
Since the first week I've been getting consistent work through the jobs desk. Without them it would be seriously hard to get by in Sydney.