When I was a lot younger I used it very often, and most of my friends would choose to use the board with me. However, after various encounters with some spirits, we came into contact with Zozo.
Zozo is well known for being a demon who contacts you through the board and then takes over; he will lie about who you are talking to in the future and always be a part of your board. After we talked to him, my friends all refused to use my board with me.
I have since moved to a different city to go to college, and I brought the board with me. Although I have not used it in the building I live in yet, my roommates have accused me of bringing spirits into our home based on experiences I have had since I have moved in here.
One day when I was in the shower, I heard what I though was one of my roommates giggling and calling for me, but when I asked her about it, she had no idea what I was talking about, and she had not been trying to talk to me.
I have also experienced furniture in the living room being moved around, have heard loud things falling in the kitchen (only to inspect it and see nothing wrong), and I have had things in my bedroom disappear.
Since I have been living in this apartment I have not used the board, but I am very tempted to to see if Zozo is still here with me.