sosoph:We have the nook and really liked it - it is so easy to get really clean. We used it until about 18mos when we switched to a chair booster though. you might think about a multi stage chair booster
I would love to, but my kitchen is too small to leave the table pulled away from the wall far enough to put all 4 chairs around it, 
. This is why I was looking at the Hook. I can fold it up and hang it on the wall when it's not in use, and it will be convenient when I need it.