Been meaning to purchase these for a while now.  I have issues with foot pain and I'm hoping these will solve some of the problems.  Wearing standard rubber boots seems to aggravate my feet.  These are really comfortable and are well made.  I ordered the same size as the boots I wear and they do actually fit!  A little hard to get on at first, but I'm hoping, as time goes by, they'll get easier.  Going up in size might make them too loose.  I wear Timberland Pro steal toes underneath.  Hope this helps!  Would definitely recommend!