This is the only repricer on the market that works for Amazon Private Label Sellers. Other repricers simply compete on the buy box with other sellers, mostly on price. This one tries to find a balance between number of orders and sales price, incorporating market demand - all to give you the most profit.
I have not used them, all I can say is they are really expensive for small sellers. It is worth it, if you're a large scale seller.
Apester