It's functional, but it's heavy enough that it causes my laptop's fans to go full blast. Having to click to nudge sand through the hole, when you clearly made the hole more than big enough for the sand to naturally fall through, it's a neat concept at first, but then gets very annoying quick, mostly of how unnatural it is given how it looks. Not to mention the atrocious early flow of it. I gave up on it, don't know if there's more to it later on, not sitting through the early slog to find out.