I’ve never used the product either, but I would be wary. There are many 1-star reviews, one of the common complaints is specifically around using your own images (which I imagine you would want to do almost exclusively.) It also seems like a severe handicap to not be able to resize the images. It’s also pretty expensive for a toy. You can probably get a lower end projector for just a little bit more investment. That in combination with the Camera Lucida app (which does let you resize images, angle them, mirror, and more) will serve you soooo much better.