Since we're talking about NFL OT rules, I have to say it is simply the worst OT in all of sports. The reason is that it's the only sport that doesn't guarantee equal chances. The only sport. And we've seen it play out, in disastrous proportions again and again.
Seattle, at home, beat Green Bay in the NFC championship after winning the coin toss and scoring a TD; MVP Aaron Rodgers didn't get to play.
Arizona, at home, beat Green Bay in the next year's playoffs after winning the coin toss and scoring a TD; MVP Aaron Rodgers didn't get to play.
New England beat Atlanta FOR THE SUPER BOWL after winning the coin toss and scoring a TD; MVP Matt Ryan didn't get to play.
This is the equivalent of a walk-off run in the TOP of an inning. It is the equivalent of "first basket wins" in basketball OT. It is not equal. It is not fair. College football's OT is quirky. But it is fair.
Clearly the NFL should play a 10-minute period, in full. No sudden death component. Because it's fair.
We now have a Super Bowl coin-toss champion with New England. (And I appear to be the only person on the country to have noticed.)
That said, this doesn't apply to Cleveland today. They won the toss and had chances and only got three-and-outs before fumbling a punt and losing on a 59-yard field goal as OT time expired.