My son and I both really love this swing. We had to buy it suddenly as a replacement for our other swing. (he got to heavy for the batteries to swing him) So of course the fisrt thing I rave about is the plug in feature. i have saved SO MUCH on batteries. It's been wonderful. Not only does it continuously swing, but it also plays music (with adjustable volume) and spins a mobile. The music and mobile are on a timer. i can't remember the exact amount of time, but i think it's about twenty minutes. It came with a detachable tray which also has a little something for him to play with on it. The seat is hard plastic with a removable (and washable) cover. The seat can be sat up or slightly reclined. Those are the only two positions. But I love the fact that we can spin his seat. he can swing side ways, back and forth, and diagonally. Even when he isn't swinging, it's helpful to be able to turn him towards me while I'm doing things around the house. I love this swing. Well worth the money!