I remember hearing this a lot in the first half of the 70s. Some of the older kids I knew at the time must have had it as a piano lesson piece, because I can see them in my mind playing it. I’ve always liked it quite a bit. It’s part of a double-sided hit–another of my Chicago faves, “Beginnings,” was the A-side. They’re sitting at #8 here, one slot below their peak. I’ve learned from the various AT40 sites I visit that, although Casey would often feature the B-side occasionally during a double-sided hit’s run, he never actually played this side of the single on the show.