[youtube]http://www.youtube.com/watch?v=gxxhGHkTbYs[/youtube]
She's very competent, but the playing is choppy and there are far too many ackward gaps. It's not a lack of skill, she demonstrates she has the ability to play an extremly difficult piece with ease, but her interpretation of Alkan's intent with this piece is lost. She's improvising ( not the notes, she's playing it as written) but she's taking liberties with the tempo and the accents of many of the notes.
While it's interesting to hear another version, I wouldn't buy it. in addition, and this is not a fault per se, the facial features she makes are distracting. I say not a fault because Glenn Gould used to sing while he played. I don't know of any recording that Glenn did of Alkan though.
One tiny point (there are others, but I'll make this point). At the end of variation XVI, you can't hear the last E note. (At 4:39 minutes). The sheet music calls for PP and Ped with the first 3 (of 4) E notes and the last one as P, yet she either didn't play it (I couldn't hear it anyway) or she's played it so softly as to render it non-existent.
I can read music by the way and have all 12 pieces of Opus 39. That's why I know when a note either isn't being played or it's being played incorrectly.[youtube]http://www.youtube.com/watch?v=JSIvV8OqNgU[/youtube]
This is faily true to the original. His playing is smooth, competent and the tempo is right on the mark.
[youtube]http://www.youtube.com/watch?v=MSpvaIIDJu4[/youtube]
This is the best of the lot.

Jack is truly the successor to Lewenthal. I doubt anyone can top Lewenthal, he was the master of Alkan interpretation.
For anyone that finds this piece interesting, here's a wee bit about it.
It's actually a variation on a theme. The theme is set-out in the 1st eight bars which is then followed by 25 variations on that theme. It's such an incredible piece that upon first hearing it, you'd be hard pressed to even know it's actually a variation on a theme.