I'm leaning towards the FP Space Saver for my 5 month old who is just starting solids. I just measured my kitchen chairs, and the seat is a bit smaller than the dimensions of the Spacer Saver, in both width and depth (about an inch smaller in both directions). I'd love some input from Space Saver users: Does the Space Saver still work on a chair that is a little smaller that it's footprint? Would it make a differance that my chairs are padded? Thanks in advance!