I find this recording charming and fun to listen to. At times Ms. Chassot's accordion sounds like a small church organ.
Hearing Mozart's piano concertos on a different instrument makes me think more about the melodies and other aspects of the music 'underneath' the performance. This approach reminds me of what Wendy Carlos did with Bach's music when she transported them to the Moog synthesizer. For those of us who can't merely 'read' a score and hear it in our heads, such transcriptions give us a glimpse into the genius of the score.