I'm a low weekly mileage runner. Weigh about 155. Not training for races. Just exercise. Know a little about running. Was a member of the New York Road Runners Club. Ran 2 marathons and dozens of other races at varied distances. Trick is getting your foot size just right. Once you got it, it is all good. New Balance sizes are always constant from one sneaker to the next. The MR8512 feels a bit minimalist which aligns it with the  theory that less is better. More like the South African and Central American bare foot runners. It helps teach us better running mechanics. Anyway, my runs feel natural and my feet feel just fine after my runs. Sneaker feels like a racer and also feels like a trainer. I highly recommend.  I would also suggest that you go to the New Balance site and look up help as to picking the right running sneaker for yourself. Best of luck!