I love my Spider Pen. I love that it can be turned on and off. Without exposing too much, it's really good for making things float up and down instead of them just floating stationary in the air. I've also used it for a haunted deck routine where the deck separates at the chosen card and then the chosen card rises up to my hand. I'd say it's well worth the $40. BUT ... as mentioned above, the thread and battery issues can sometimes be troublesome.