Though Amazon has excellent and proven features, these won’t necessarily work on any e-commerce website. Let’s take their customer reviews for example. Target.com bought Amazon’s customer review software. Though the software and the interface are exactly the same, Target.com basically doesn’t receive any reviews at all: in the first month after Harry Potter and the Deathly Hallows came out, Amazon got 1 805 reviews whereas Target got only 3 (both retailers sold about 2 million copies).