I to purchased it, worked with it for about a week, requested and received a refund.
I found Terapeak much more useful by researching SOLD items. I can even determine TRENDS by checking 7 day, 30 day & 90 day to see if the number of auctions on an item is increasing or decreasing as well as if the selling price is trending upward or downward and finally if the ratio of auctions ending in a sale to # of auctions started is solid.
For instance if I see that there are 3000 auctions per week for an item and 50% of them end in a sale that result in a potential profit for me...I'm all over it...whereas if the number of auctions are declining and only 16% result in a sale and most of those wouldn't cover my cost...I look elsewhere.
In most cases a 33% sell through would perk my interest because that means that with a successful sale (free relisting with ebay if it sells on 2nd attempt) I staqnd a 66% chance of selling the item successfully.