Enjoy mate, it sure adds a new dimension to the lenses that it goes on.
It has been pretty fun seeing what it can do. And for the price it isn't a bad pickup at all. It really shines on the long end of the 55-200. I didn't really like it much on the 18-105. Too much vignetting, and since it is only 105 the magnification seemed to be a lot less than on the 200. Also the 55-200 has no vignetting....so I can use the whole frame and get as many pixels on the subject as possible.