My Experience
I used one with a friend of mine. I didn't exactly know what it was i was really young. Heard a few ghost stories at school and thought it would be a laugh.
So we used it, and as expected, nothing moved. As we was about to give up and go play football, the upstairs airing cupboard door slammed shut. Now this door had thick carpet underneath it and you had to drag it shut by hand with force, it couldn't swing, it was also a summers morning with no wind. The only way i can describe what happened next was an overload of evil around me, i started to cry and my mate ran away.
Over the years after we used it, the whole family would wake up with the "did you hear that?" We would often all appear from our room onto the landing and ask who is playing that music, or who was banging downstairs? I had a girlfriend stay over once and she told me the TV was left on downstairs as she heard talking in the night, but no TV was on. Just loads of things like that happen ever since we used it.
The main thing that scared me was when i used to be up on the PC downstairs all night. Headphones in, gaming away. I used to see a figure from the corner of my eye walk down the stairs, across the living room and behind me into the kitchen. I used to be convinced it was my brothers coming down for a drink, but when i used to look behind me, nothing! I just used to think i was tired so went to bed. Then one night my dog shot up in his basket, ran to me shaking like a leaf and pressed his body against me, his head fixed to the top of the stairs then moved all the way down, like he was following someone walking down, across the living room, right up to us. I will be man enough to say i have never felt so scared in my life when my dog also reacted to the same thing.
I still don't "fully" believe in ghosts but after all the events that happened after i used that board, i'm certainly open minded now.
The funny thing was, a week after we destroyed the board, the first time me and my friend met up again we went to the library. We opened a book on ouji boards as the event interested us, and out fell a piece of paper saying "play me again".
Gods honest truth on my parents life the above happened