I love these shoes.  I bought them two years ago while on a tourist trip to Washington DC.  My feet were killing me from plantar fascitis after a couple of days of walking in my most comfortable shoes.  A friend had raved about MBT's, so I bought this shoe.  I normally wear a size 8 but bought a 39 which is a full size larger than my regular shoes.  The salesman told me to limit myself to 20 minutes of wearing for the first few days.  They felt so good when I left the store that I wore them the rest of the day with no problem except a little soreness in my calves.  I wear them regularly all day one day a week for a volunteer job that requires me to be on my feet all day, and the results are amazing--no foot pain, no knee pain (one knee is pretty bad with regular shoes), no back pain, better posture, stronger legs, better balance and little fatigue after all day on my feet and lots of walking. I have a high arch and narrow ankles, and this model works wonderfully for me. I am so sold on them that I decided to buy MBT's to replace most of my other shoes.
  One thing I have learned is that it is necessary, for me anyway, to try the shoe on before making a decision about purchasing.  The reason is that different models may fit quite differently.  I ordered another pair at the same size, and it is way too big.  I also ordered a second pair similar to this shoe, and it doesn't fit the same at all.  The arch is definitely not as high, and it seems to be wider and roomier in the toe box.  That shoe is going to require a thicker sock.
  If you are new to MBT's, be patient.  They do take some getting used to and some breaking in.  They are not hiking shoes and don't work very well on uneven surfaces.  And they are very expensive.  Having given you the negatives, I can say for myself that any negatives are far outweighed by the physical benefits.  As for price, MBT's are quite expensive, but the quality is far superior to other brands.  I also have a pair of Skechers.  The price was right, but they have broken down considerably after 2 years. And if you have to order on line, it seems to me that the sportier shoes with interior padding seem to run smaller than regular shoes.  The oxford style I bought recently with little interior padding seems to run true to size.  Be sure to purchase from a seller who will exchange what you buy without difficulty, not always true of some Amazon sponsored sellers.  Give the MBT's a try; your feet will be grateful.  No, I am not being paid by MBT.