I used their course as part of training for one of the AWS Certs and found the videos/quizzes pretty informative and useful. Not too long-winded, and an easy en

I used their course as part of training for one of the AWS Certs and found the videos/quizzes pretty informative and useful. Not too long-winded, and an easy enough to use interface. I only did the one course, but from that, I'd recommend it.