We're getting ready to roll out Olark on our site, but I'm kind of wondering if it will just increase the support workload without actually improving conversion rate much. When I was first checking out Olark, I'd pretty much decided to buy it, but because the widget was there (on olark.com), I spent some time chatting with one of the founders and asking questions. We'll probably start off with something like 20% of visitors getting the Olark widget.