It has been an hour or two to mount so the user guide is impractical, and it must do things seriously if we want to avoid serious problems for the baby. Furthermore we were quite disappointed by the tissues of the swing is really bad and poorly sewn over. Finally after having obtained 4 LR20 batteries and a LR14 battery (not supplied with the seat), we were happy to have managed to complete the installation. If you have a Visseur-UNWINDER device, it will not be a luxury. But once on, our sweetbabygirl laughed so she was glad to swing his small music provided in the lower housing of the unit. Now who is it for? An infant from two months. One can lie in a horizontal position the seat and start the vibrator. And for the older, the term is relative, a baby with a maximum weight of 9 kg. For safety reasons, and although baby is attached to the middle, do not exceed this weight, I do not think the pod resist. Finally it can serve as an additional toy between 2 and 9 months of the baby's weight. On a positive note we can bend quite easily by pressing a green button down, and returning the seatback backward. So at that level, a transport option pretty easy. But be careful, a lot of plastic; therefore protect the well, if possible with a bag during travel. Given what I said about the fragility of the seat fabrics, I do not guarantee a long service life for this swing. I hope there is better on the market for a device of this type. But finally the moment our sweetbabygirl it so much fun !!!