The ISO file is approximately 4.5 GB in size, so ensure you have enough disk space available.
Here is my honest take after using the official ISO (via the Visual Studio Bootstrapper’s --layout command) for several months.
vs_setup.exe --certificatepath C:\certificates
If you rely on an offline ISO, you are responsible for updating it. You cannot simply click "Check for Updates" inside the IDE (unless you have an internet connection, which defeats the purpose of a purely offline setup). You must return to the command line, re-run the layout command to fetch the new files, and re-create the ISO. This is a labor-intensive process that requires discipline.
