Well, around here, we always called in 'Wee-Gee'.
My mother and my aunt were Jw's. They bought one. I watched them use it when I was maybe 12 or 13. The damned pointer went all over the place so fast you had to have a third party there to read what it pointed to. [Hence my presence in the room.] My mom took it out back and tried to burn it - it would not catch fire. Really! My aunt took it to their house - and though I was never a believer in such things deeply - they had all sorts of things go on - cuppboard doors banging in the night, water turning on without help, toilet flushing with no one in the bath, knocking on the door in the middle of the night. My uncle - who was never Jw - made auntie take it out of the house based on what he saw. He was visibly shaken.
My wife's sister [not a Jw] worked in a dept store that sold them. She was putting them away one day and the game she had in her hand gave her such an intense electrical shock that she refused to touch them any longer.
All these stories came from what I consider honest and reliable people. They had no basis to make them up - in fact, every reason to make up the opposite, in order to discredit the 'silly religious superstitions' of Jw's and other Christians.
Jeff