Watermelon and feta cheese, what a wonderful combination! I actually added more cheese than the recipe called for (double or more), but that's my only recommendation as this recipe was quite nice as is too. The liquor store ran out of ouzo so I used sambuca instead, which is also an anisette liquor but a bit sweeter. Because of that I thought I should add more vinegar to the dressing, which I did (and cut back a bit on the oil). Unusual combination maybe, but I think you'll be very pleasantly surprised! Thanks bluemoon downunder!