My last pair of slip-ons was a pair of red wing pecos steel toe.  I was looking for something lighter and comfortable as well.  I read the reviews for these boots and bought them.  I have never bought shoes, let alone a 170$ pair of boots on line.  I wore a 9.5 E2 in red wing pecos but decided to get a 9.5 D of Thorogoods.  They fit a little smaller than red wings but I wouldn't move up on size at all.  They are a beautiful boot and fantastically made.  I am a union pipefitter by trade and nothing shows your pride more than wearing a great pair of union made American  boots!  I will revisit this post on 6 months to give an update.