We already had one because I do yoga (sometimes), but they're cheap, and you can sit and bounce for days, which we did with our first in the first few months. They're super mobile so you can bounce wherever you and your baby wish. They do take up some space and are hard to keep from rolling around the house, particularly if there are older children around (if you don't want them playing with it or "bowling" toward their infant sibling. Our second baby didn't need much rocking or bouncing at all so after the first few weeks we rarely used it and due to the enticement of "bowling" for our older one, we actually deflated it for a while. If you need to bounce, rock your baby a lot or even a little, it's a great and easy way to do it.