We had one while I was a kid. It was pretty great, actually. We may have actually had two (an upgrade) now that I think about it. The funniest part was that it was a two-sided format, so you had to "flip" the movie over at parts. It got to the point where you knew the breakpoint was and instinctively starting walking to it just before the flip point. Longer movies took multiple cassettes.

For a kid, it was pretty easy to use.

Another great thing was the large crates required to store your collection. It was very satisfying to try to find your movie.