From the day I received them, they were extremely comfortable. I bought them for a month-long trip to Europe, as one of my pairs of shoes. Didn't realise at the time that I would wear them every day! The only thing I did was to insert a gel arch support in the left foot. The shoes are just wonderful and soooo comfortable! The other pluses for me are that they have half sizes and narrow sizes available. And they come in several great colors. I didn't want to look like an American with white tennis shoes -- I bought dark blue, which went with everything. Great job, EasySpirit!!