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?
Virt-manager with qemu-system, although if you use the kvm driver for both performance should be about the same I think.
Don’t forget virtualbox has a lot of configuration options that may improve performance, Ive never had a problem with it but also never need high performance from a VM.