VirtualBox is ridiculously simple to set up and get virtual machines going. Shared folders, shared clipboard and much more are no issue.
But.
It eats resources. The installed virtual machines (VM) run relatively slow. What have you found to be feature comparable - and most importantly more resource-efficient - alternatives for running VMs under Linux?
And it performs very well, especially for gui applications. It even supports multiple monitors for the guest.
For running a desktop it’s clearly superior and “fast enough”. I used it to run my primary development environment for years.