For those that wonder (and didn't already) know, a lot of the tracks on this album were remixed. At the time the producers also chose to alter some things compared to the original tracks. For instance, the drums enter much later on Hard Luck Woman than they do on the version on Rock and Roll Over. For Calling Dr. Love there's some editing done where a part of a chorus disappears. And the intro to Rock Bottom suddenly shows up all by its lonesome right before She. So, in a sense it's an interesting album (but not because of the re-make of Strutter, which is, incidentally, a new studio track) because you'll hear "new" versions of old KISS songs. Unless you own Killers or Smashes, Thrashes and Hits... a lot of the Double Platinum versions ended up there.