This wasn't the first LP I wore out -- that was ABBEY ROAD -- but this was the first CD I wore out!  Wonderful, innovative music that sent pop into a new, more sophisticated stratosphere than the jingles and Delta blues mashups that had been the going thing beforehand.  If you already have a copy, consider buying a copy for someone who was not yet alive when the Beatles broke up.  To understand them, listen to them, especially this album.