There are two ways that it helps: First, a well written return policy will often deter anyone from even filing a return. In those cases, it's an "instant win".

I've also had eBay side with my policy twice on returns. I've only had to escalate it twice- I haven't had many returns.

In your case, #1 happened. That's the best scenerio.

I've read WBSTS's return policy (And mine is based off it). If he'll show you, it's really a good policy....