Difficulty of Zarębski's Piano Quintet

[ragaih]

Hello,
I am just beginning to learn the piano part of Zarębski's quintet, and I am wondering about its level of difficulty. Are there any other piano parts in chamber works of similar difficulty? I recently played the piano part of Franck's Violin Sonata in A Major, and it was quite challenging, especially the second movement.
Thank you in advance for your response.