I like dyneema for two reasons. It's easy to make your own and dealing with them when setting up or tearing down the boat.

I splice a loop and put a piece of cover on it as well. I haven't had one break yet, (fingers crossed), but I'm pretty good about inspecting and not risking it if they look sketchy. Losing your boat as a singlehander is not awesome.

In corpus, Robbie and I were double trapped going to weather when the return part let go. I hung onto the mainsheet and drug the boat to a stop. Power flushed my sinuses on that one, and I think I just about dislocated a thumb with my death grip on the main sheet.