Yes, it is a good effect, one I'll use. It is cheap, and after watching the trailer for the first time, I had an immediate idea how I would do it, but later on, I was curious if I had the right idea, and figured for the price, it would be worth buying just to see if I was right. By accident, perhaps, I WAS right, but the rest of the information on various things in performance, it was still very simple and worth it to find out the rest of the information.