My guess is that stuff is the same as OneStep cleaner. I used that exclusively for years to clean/sanitize. I never had a problem I could attribute to it. Then I discovered Starsan. Now for just sanitizing I only use that.
Long story short. I agree with those guys. Go ahead and use it for your bottles but consider Starsan in the future.
BTW You can use a mild bleach solution but you will have to rinse the bottles out. In a pinch that works but is a PIA. Back in the dark ages of brewing that is all we had.