The document discusses the author's experience installing software both with and without Docker. Installing without Docker was a "miserable experience" with issues like the software not working, needing to install additional dependencies, modifying sources and rebuilding, incorrect path configurations, installing other versions, and eventually reinstalling the OS just to get it to work, though the reason it finally worked was unknown. Installing with Docker was much simpler - just install Docker, get the Docker image or Dockerfile for the app, and run it. With Docker, containers are isolated so new installations never conflict with existing ones. The author concludes that Docker makes installation a better experience.