These are great images for running in throwaway VMs, but how trustworthy is the project and how safe are the changes for using on bare metal as a primary OS? I

These are great images for running in throwaway VMs, but how trustworthy is the project and how safe are the changes for using on bare metal as a primary OS? I haven't audited the scripts they use, but I'm always concerned about running any custom Windows version cooked up by a random person.