This is a solid, jumbo-sized visual effect well suited for parlor or stage. (It actually shouldn't be used too close up.) Since I dedicate a segment of my show to my love of classic movie monsters, this fits right in! I usually shy away from any phone app-driven tricks but this one works fine with or without the app. (The QR scanner actually takes the spectator to an ad, so you must tell them to skip the ad! This is not mentioned in the instructional.) The finale has elicited stunning reactions so far. What may seem like a minor detail, the cut-out paper squares, greatly add to the visuals and reaction.