Although it's labeled as introduction/practical, the content is too lacking...? AWS, docker, and Kubernetes courses were substantial, so I bought Redis too, but I think I bought Redis for nothing..; For 3 hours with not much content at this price... I don't think I could recommend it to others It seems like you should add more advanced courses to this lecture..? I was going to study MySQL tuning too, but I don't think I can buy it if it's like this.. I think adding Redis advanced courses would make it worth the money