I find that I generally travel above the speed limit and feel far safer than I do when I set my cruise to the proper speed limit. Why? Because when I'm passing others I get to choose how long another vehicle is in my blind spot, or how often someone is trying to park themselves in my back seat. When I go the speed limit I always end up in a pack of cars all jockeying lanes with someone far too close to my rear bumper and a guy in front of me swaying up and down in his speed... I feel generally unsafe leaving control of my speed/position up to the other cars on the highway.
* Very obviously, these are subjective takes and likely don't reflect reality. No vehicle accidents in 17 years makes me think I'm doing something right though
Don't believe me? Try: https://www.youtube.com/results?search_query=Canada+worse+dr...
I do a lot of highway driving, and Saskatchewan doesn't see the same level of congested traffic that you'd get in bigger metropolitan areas. So my comment really does have a lot of particulars that aren't universal. I take a different approach to driving while in the city which does not involve frequent speeding.