The fisher price rain forest booster seat is a great investment!  I bought another brand expensive high chair and it takes up way too much space and terribly difficult to use.  The fisher price booster takes up little to no space and works on any chair I even use it on an office chair at my place of work, very easy to attach and reattach when going mobile with it.  Also a great chair to take on trips or to the restaurant instead of the yucky dirty uncomfortable highchairs that are usually provided in restaurants. Also great to take to grammy's house or on a trip where there might be no chair...