Just received my MBT Mahuta's and have been wearing them at work for the past few hours. I am a chemist and am on my feet a lot. I normally wear Cushe shoes and they are excellent. However, MBT has got something here with this interesting design. I really love the feel of these shoes. There is an amazing amount of cushioning and stability with these and coupled with the interesting convex shape of the outersole makes them very comfortable. I find myself see-sawing on the concave arch and this is very relieving. I can definitely see these being great for long day wear.  I don't know why the Blue Mahuta style was so far cheaper than the other colors. I guess a supply and demand issue. Blue defintely works for me. Heading off to the gym for a leg workout. I expect that they will be great there as well.