Detail-wise, it's a beast. A lot of performers just play the figures as a solid 2-note interval... they kind of miss the grace note feel to it.
I played this a while back (when I was in high school and was obsessed with just playing fast pieces for the sake of it), and I came back to it a few weeks ago... it's not in Liszt's more difficult group of etudes, but it has enough to really bug you. It also kind of shreds at the end...
It's such an appealing piece though, very accessible for the audience's ears (it's got a catchy hook to it!), and it's fun as hell to play.
I'd probably compare it to Chopin's mid-level etudes (probably around the same as the Revolutionary, Op 10 #8, Op 25 #1 & 2, kinda thing). It doesn't hold a candle to La Campanella or any of the Transcendental etudes though haha! I would say that it is slightly more difficult than Un Sospiro (which everyone around here seems to be familiar with...)