These disks, recorded just before John Ogdon died suddenly, show a late 1980s side of his musical personality. If you cannot get hold of the concerto recording on Collins, and probably you can't as the company went kaput, thiese recording will be as late-Ogdon as you'll hear.
Some of the unbelievable technical facility of the 1960s and 70s has waned, but there is still much there in these recordings. Were you to hear these performances live you would be well satisfied on a technical level. The innate musical perception is still much in evidence, there is playing of great power and gentleness, and a great structural grasp of the music. Ogdon is, as always, a servant of the composer. Some of the playing is a mite abrupt, but it does reflect what the man was going through in the days following his mental health problems - but the music IS being played by this man and listeners who understand this gain in their appreciation of what is actually going on. I do not agree with the previous reviewer that these are a shameful exploitation of Ogdon's memory, they are recordings - very well sounding ones - of a man turned in on himself playing music by a man who also had an unfathomable inner life and was known for his perversity and miserable demeanour. Not for nothing was Rachmaninov known as "The Scowl"!
If you enjoy the musical struggles and triumphs of a late Callas recording, or Jon Vickers after about 1980 - both great musicians - you will enjoy these last musical thoughts of a wonderful musician. This is dangerous music-making, and we hear too little of that in our sanitised modern world. What do we think Beethoven sounded like when playing his piano? Would we like to hear him? Of course we would, so give this a try on those terms. If everything must be spick and span for you, choose Ashkenazy, who is a fabulous musician without the internal issues John Ogdon had. If you like a battle, a titanic inner struggle wrought out on the piano - buy these disks safely.