I have long wondered whether I keep the package, because the sealing of the boxes was broken and the device itself in a plastic bag, which gave the impression that it has been used. However, the me function has even convinced one finds the baby really easy (I have the first time in the 15th SSW used) and it really calms immensely. Whether you need something, of course, everyone has to decide for themselves. It helps me the time between medical appointments to bridge. Sometimes the part makes quite nasty, scratchy noises, which I put on the cable connection and where I have hoped for more real quality for the price, but the duration of the pregnancy will keep it well.
