From what I understand about Onero is that it focuses on weights. Heavier weights that challenge you. BUT....there is only one place that you can take it in person. It's in Somerset, New Jersey. I'm sure you know that it originated in Austrailia and there are plenty of places there to go in person. I don't know about online. I heard that you can't take it online because of the weights. You have to be supervised with in person classes. Would welcome feedback from anyone out there!