I have flat feet with bone spurs on my heels, and I walk a lot at work. I also took them to Spain in Spring Brake.
They put up with all the walk I did during the trip to Spain (you walk a lot there), and my feet were rested at the end of the day, to pain, no stress. I used them to fly and to walk at the airports and my feet did not get tired at all.
I am a support teacher at a school, and I have to walk a lot during the day, and these shoes have made my days at work a breeze, because they are good for walking all day but also for standing.
The company says to try them for at least 180 days and there is a reason for that. You need to buy them in advance and break them down first. This is to give the shoe to adapt to the shape of your feet. You might feel discomfort at the beginning maybe the first couple of months or so, but the discomfort will eventually go away and that is when you start feeling the best of these shoes. Thant happened to me, and I thought that these shoes were not for me, but in the end the proved me wrong.
I want to buy another pair, but they do not have mi size 9.5 available, but I will keep checking.
Another thing is that they are very roomy inside specially in the front of the shoe, so no need to buy a larger size.