Exactly what I needed for my game. I'm used to using ripped sound effects from all kinds of AAA games as placeholders, and have been doing so far years for various other projects. I've have been having a hard time replacing my placeholders because of their high quality and how well they tend to stand out in a mix of other SFX and music.
I've already been playing with just these demo SFX and they work PERFECTLY out of the box. They are also great for mixing and layering with each other for more complex sounds. Even though I have a library of thousands of sounds, this demo already fills a lot of holes I was missing in my library with some niche, yet everyday sounds.