This is a blended version of the original shaken Margarita. It simply takes the original recipe and tosses everything into a blender with ice, creating a refreshing lime drink that is great on hot summer days.
You may notice that there is a significant amount of sour mix in this recipe. This is because besides adding a little lemon to the lime flavor, it also adds a nice amount of sweetness to counteract the tart citrus. In other margaritas with sweeter fruits, the recommendation would be to use less (or no) sour mix. As with any margarita, you can adjust the flavors to suit your own taste -- this recipe is just a base.
The beauty of margaritas are is there are many more variations with almost any flavor you can imagine.