I don't much like the cello suites transcriptions - the polyphonic nature of the keyboard seems to work against the "single string polyphony" that is the essence of the Cello suites - everything sounds too obvious, too simple, no challenging blanks left for the brain to fill in.
The violin transcriptions seem much more successful to me because those works are by no means single-string. In fact the way he plays them turns the music on its head - arpeggiated effects on the keyboard replacing plain double-stopping on the violin.