They feel very natural and comfortable once you are used to walking in them, and the knee soreness I used to feel after taking long walks has lessened quite noticeably.  I would recommend these as a great walking shoe that feels very comfortable, partly due to the large black foam piece in the heel that you can see in the picture.

These shoes are not good for standing, so if you have a job that requires you to be on your feet and stationary for long amounts of time, I would not recommend these.  The base of the shoe at the heel is thin and curved, which makes standing still feel very odd.

I would also not recommend these shoes in inclement weather as I have found that they make it much harder to keep your balance when snow and ice are on the ground, which I learned courtesy of Nemo.