If one can get over the thinness of the part-writing, especially in the slow movements, there is much to enjoy in them.
Themes, part-writing and harmony are closely bound up in one another, and harmony is not the least important.
Harmony was virtually unknown in antiquity, and without a knowledge of part-writing no independent art of music is possible.
The part-writing is often exceedingly elaborate, but the most complicated concerted pieces flow on as naturally as a ballad.
The form is concise and symmetrical, the part-writing is clear and well-balanced, and a "sunny sweetness" is the prevailing mood.