The shoes were comfortable from the start.  There does not seem to be a great deal of cushion to them, so I am not sure how they would be for serious running.  They are more like a reasonably priced "running" errands shoe.  The removable insert inside the shoe is very thin also and does not provide any real support or cushion.  On the right shoe, the lowest "eyelet" had been slit on both sides of the shoe, so the lace doesn't stay in them.  It doesn't make a huge difference, other than the lace on that side is a bit longer.  Didn't seem worth the bother of returning the shoes.  I would say it's an average shoe with decent comfort, but not a trail running shoe.