These pieces taught me the importance of the middle pedal, which I now use not only in the transcriptions, but in just about everything I play. In any case, the transcriptions require very delicate pedalling (that gave me the most trouble) to get a nice big, but not noisy, sound out of the piano.
i didn't like them as much as i liked the kempff transcriptions of bach that i got from thal. but, i still play them once in a while. the C major prelude and fugue is my favorite.