Because the ikea highchairs stack, they really can't be beaten in terms of taking up the least space to store compared to any other highchair or booster that I have come across. In addition to that, if you find that you have an older group and don't need the highchairs out for an extended period of time, then the legs come off so even smaller to store easily.
momofnerds...I have only ever seen the white ones. When did you purchase yours? I`d love it if they weren`t white and that way the spaghetti sauce stains wouldn`t show, although they never last as they are washed down so frequently they are always gone after a few days.