Question about rogers ppv?

I want to order (Strikeforce Gina Carano vs Cris Cyborg) on rogers ppv. This is my first time trying it, and i would like to know what time would be the best time to order it. Should i order it 20 minutes early or right when it starts? I just really want to see this fight and any of your info on ordering ppv on rogers digital cable would be great! Thanks