I would disagree, labelling it more grade 4 standard instead, depending on which piece you choose. It involves lots of very repetitive technique (arpeggiated accompaniment etc), so once you are OK with that, you are pretty much sorted for the rest of his music. I giorni has exactly that in, with no particularly difficult (if any - it's been a while!) jumps. Which other pieces were you thinking?
EDIT Come to think of it, there are some of his pieces I might put up at the top end of grade 5, but most are simpler than that.