Experiences with Zend Safe Guard?

The suits at work are looking at the Zend Safe Guard and I'm just wondering if anybody had any experience with this new tool. Is it worth the purchase, and has it been worth the price? We already have a Zend Encoder license, so we're getting a bit of price break for the Safe Guard, but it's still (like most Zend products, it seems) a bit pricey. I know to most big mammoth shops the price isn't a bit concern, but I like to stay thrifty, so if I start hearing horror stories I'll look into something else. On the whole, I like the idea, and I've been looking forward to it's release ever since I found out about the tool. (About a year ago plus change.) Anyways, experiences? Good? Bad? Worth it? Thanks. J