I've been thinking about trying this out for a while and finally got to try it out at MEC this afternoon and found I actually quite liked it. I'm thinking of signing up for an intro course. Groupon has an intro course and 1 month of unlimited climbing at Crux which looks like a good deal.
Any tips for beginners?
What sort of gear should I have to get started? Worthwhile shopping for used harnesses? I was browsing through the MEC site and see there's fixed and adjustable harnesses. Why would I want one over the other?