My Amazon sales had been lagging for some time, so when I saw RepricerExpress's offer of free trial, I signed up...mostly because I felt whether it helped or not, it was worth a try, given the way sales had been.
I was more than surprised, let's say giddy, when I sold several books within the first 2 hours of the new service. Since then, my sales have easily been twice what they were before.
In addition, the support staff is without peer. Always ready and anxious to go to any length to provide answers that you need.
This is an un-solicited review. There are so few truly aggressively competent companies out there, that they deserve it.