I'm testing it on some white/light-gray hat sites. It does what it says on the box, and once I get a campaign set up, it indeed works while I play games. And, it is good for those sites where getting an SE ban is worth avoiding.
All in all, LinkJuicer is a great idea that has been frustratingly nerfed by the fact that the developer is thinking way too small. And I dislike anything that takes away my ability to choose my own risk level.
It's not automated enough, or scaleable enough. Even with outsourcing. If you want to roll a million URLs through (I've had sites nearly that big), forget it, even if he did make it possible to have that many "campaigns," you'd have to hire all of India and China just to type in URLs and do the spyntaxing.
Also, even though you can have 50 "campaigns," your entire account only gets about 20 links/day--randomly spread among them. Even if the developer gets the other 10 social media sites in, that'll still only bring in 40 links/day. That's not nearly enough.
I had contacted the developer about larger accounts, but the more I think about it, I've pretty much come to the conclusion that this isn't going to ever be robust enough for my needs. It just couldn't handle, say, a 10000+ URL site. Much less 10 or 20 of them!
Something more along the lines of SimplifiedSES's Link Exchange service is more what I'm after. Or a different one that's supposed to come out soon. I want lots of links, to lots of pages. All automatic, including entering URLs into the system. And the links come in as fast as I want, to the exact pages I want. And no pages that get no links because the randomizer didn't land on them that day (or the next day or the next day or the next day...).
LinkJuicer is like a Lamborghini that's been set so it can only go 20MPH, "so you won't get any tickets and the roads stay safe." If I wanted to drive slow, I wouldn't be on BLACK Hat World!