I'm not 100% sure what I think about Pikuma. Gustavo is a good teacher, his methods are fairly well explained and easy to understand, but sometimes he doesn't seem to know what he's talking about.

I took his first ECS game engine course, and it was good for a few hours, but halfway through the course it was clear he hadn't really understood what ECS is and was implementing his understanding of it.

I took his updated course which he'd overhauled and it seems he now properly understands ECS and the course was much better.