Just loved it! Strength, sweat, and great body's. In my opinion it's about how far you're willing to go; are you able to go on when your body is on the verge of giving up. Will you mindset make you give up or does it help you to go on. is it a challenge against others or are you going up against yourself?
If you just want to watch the raw strength of the participants, season 2 will give you that more, as season one will give more insight on the participants as well as the tasks they are given.