Pretty good.
All in all the sounds are fairly realistic and you use dynamics fairly well. The biggest problem with this arrangement tends to be articulations. Many instruments attack with a "mwah" kind of attack and there could be more legato passages in general.
As an aside, this is one of my least favorite Ravel pieces. He was a fantastic composer and great orchestrater. Try some passages from Daphnis et Cloe for more practice.