Mamaroo Worth it? I don't need to buy anything for this baby other than a car seat and a…

Mamaroo

Worth it? I don't need to buy anything for this baby other than a car seat and a bouncy/vibrating chair. However, the swing I have is monstrous and I really don't want to bring it upstairs as it will take up so much space. I was contemplating getting the mamaroo in lieu of the swing and bouncy seat and someone is selling one for $100 on a local yard sale page. It looks brand new. She bought it last year.