The Enlarge% is a great feature for a category, however in its current iteration, it enlarges a previously scaled down version of the image.
For Example, if an image is natively in 300x500 and in the skin it is scaled down to 150x250 with say 30 or so items displayed, when you 'mouse over' the selected item and it is enlarged, it seems to be re-re-scaling the previously scaled image which looks pretty crappy.
It would be nice if the 'enlargement' was perhaps based off the original image size to provide better resolution and a better looking image.