I don't find the cross-rythms to pose too much of a problem but recently, i've had some trouble with the repeated D# and C# in the fifth measure where the right hand first jumps in. I sometimes end up skipping the one of the notes or not striking it with enough force. Would it be the most sensible to use a 4-2-3-2 or 3-2-3-2 pattern?
Also, the latest attempt at correctiing the name of the piece lacked an "i".
The spelling is "Fantaisie Impromptu".