As mentioned on another review below, literally all 4 and 5 star reviews here are written by fake accounts. You can tell by the fact that they use the exact same arguments that the site owners use on their web site. It's pure marketing. They also use these multiple accounts to "up vote" (clicking "Helpful") on their own reviews, but they never review anything else, or when they do, it's always a rival site which, of course, gets lambasted with 1 and 2 stars.
You'd have to be incredibly gullible to think any of the positive reviews are real. But if you're really that dumb, take notes of what the negative reviews point out, and then create your own account. Test everything and you'll notice that ALL criticisms are spot on.
Whatever you do, just DON'T spend your money. Scammers don't deserve to make a profit, especially when they abuse SiteJabber like this... shame.