My dad had one of these (which he said was mine) but, strangely, he always wanted to be there when I was using it. I guess I was only about 10 (1971) so my guess is that it was down to the cost of the film and my innate clumsiness.
I loved using it as I got to see the end result in a minute or two. It only shot B&W, as I recall, so I put down my love of B&W as at least partly to do with this camera. I wish the film was still available - but I could say the same about Kodachrome........