The Penguin guide to classical music described these recordings as "golden". I agree, they're fantastic. Ashkenazy is awesome, and the Philharmonia Orchestra sounds gorgeous. The recorded sound is wonderful, and the soloist/conductor and orchestra are in total harmony. Musical bliss...However, I recommend buying ALL of Mozart's piano concertos. There are so many wonderful concertos that are not included in this set. Although not all of them are on the level of 23 or 20, most of them are really good and you won't want to miss them. Starting with 9, they're all good, though some of them are stronger in one movement than the the other two movements. As far as Ashkenazy's complete set of Mozart's piano concertos, all the recordings are excellent on that set except for the concerto for two pianos (NO. 10), the other pianist in that recording didn't have chemistry with Ashkenazy. I recommend buying the complete set with Ashkenazy and the Philharmonia Orchestra along with a better performance of No. 10. If you already own a complete Mozart piano concertos set and just want to check this set out, then these two CD's are the perfect place to look.