There are variations of that loop knot and I've come up with my own version. To me simple is best, especially when tying on another streamer mid-stream. What I do is make the simple over-hand loop, run the tag end through the hook eye, then wrap the tag end around the line above the simple loop once, and then through the simple loop making sure you run it in the correct direction (don't want to undo the simple loop!), pinch together where you want the knot to be and snug it closed. I've caught some pretty big fish with this method and it's never failed.