The quality of the sound has been improved on later recordings, although only just! Stereo versus mono but what mono, the quality of the performance has never been equalled. This recording belongs in any collection alongside "My Fair Lady", "West Side Story" and "Candide", all produced of course by Goddard Lieberson, who rarely put a foot wrong.
There isn't much to add to what the other reviewers have said other than that although other recordings have their merits, there is something very special about this one. There is a spontaneity about it that makes it sparkle so. The same is true of all the albums I've listed: each cast, conductor and orchestra was at the absolute peak of its game when the alums were recorded.
If you must have stereo, the TER recoding on two discs comes close to equalling this in terms of performance and has every note of the score plus an interesting appendix. Even Alfred Drake's second recording in stereo, the Lincoln Center production misses the spontaneity of this one and no other cast matches the supreme Doretta Morrow, the sexy Joan Diener, the excellent Richard Kiley and Henry Calvin.
This is no longer cheap in the UK but it has been beautifully remastered and, without a doubt, is the one to get. I have most of the others and this is the one I would not want to be without.