Ive had it for about 10 months now, in all seriousness if you use it as a guide to back up your own instinct and experience on the whole its worth having. since taking it on I wouldn't say I've sold more cars but I have changed what I'm stocking slightly, bought cars I would never have dreamed of stocking in the past and sold for a decent margin, kept on top of the prices and noticed I'm selling cars quicker. I used to have the old problem of cars sticking like glue to the pitch without even a sniff, takes a while to get into it but its not a bad little tool and saves me a lot of time