It's pretty good. Fees are better than eBay, audience is focused. Downside is that it has a lot less traffic than eBay.
I'd say go for it, but make sure your minimum bid is a price that you are willing to take. There's many fewer bidders, and it's likely you'll end up selling to the first guy who places a bid.
The really nice thing is that you can try CTCW and since they don't charge listing fees, it doesn't cost you anything (except time) if it doesn't sell.