These are my personal opinions based on my background and training experience.
From their website at https://www.alteredsecurity.com/
"We are pioneers and global leaders in Red Team lab platform and cyber ranges focusing on Enterprise Security, Active Directory and Azure!
* PLEASE NOTE: * Four of the labs that I am reviewing (Attacking Active Directory with Linux (LinuxAD), Attacking and Defending Active Directory Lab (CRTP), Windows Red Team Lab (CRTE), and Global Central Bank (CRTM)) were taken when they were offered through PentesterAcademy.