Very Well Structured
Barry's training is very well structured, covering both the building blocks of lists and tags and forms to more complicated concepts like automations, deals and integration with other SaaSs. Every time I dive back in, Barry seems to had added new modules or updated existing training, so it remains fresh and up-to-date.
The structure of the training is so well laid out that it's easy to start from the beginning and learn new things, even for an experienced user.