User blog comment:Pgrobban/Slower energy drain or extra energy/revives/potions? An explanation for non-geeks/@comment-25889587-20150725160415/@comment-25968376-20150725171757

Well I guess I see what you mean by the time penalty. Although remember that with a good enough SED, you'd run further anyway and that's what makes it so useful. I wish I had more than one muffin to test things, though.

I updated the post and added a better readable conclusion.