I am expecting ( and registering soon!) and trying to figure out the pros and cons of a "space saver" high chair that essentially buckles onto a chair top, as opposed to a free-standing one. We have a very small dining room and it seems like one that would strap on to a regular chair and could go from infant to a regular sit-up chair would be great. Am I missing something? Anyone with opinions and/or experience with that kind of seat would be helpful.