You did get me to click the 'upgrade' button, but the pricing is too high for me.
I did one search with 4 criteria, then added the two free columns, and at this point i had spent 750 of my 1000 free credits. The next tier being $49 with only 8000 credits, which means only 10 searches a month.
The search I did was super useful, and I would love to use the product, and reccomend it to my coworkers. But the pricing is what stops me.
Best of luck. I'll probably use it once a month if I can remember :)