I absolutely love my Birkenstocks, but I will say they haven’t held up like I have heard some people say. I have had mine roughly 3 years, use the cork sealer etc. even with the sealer, they’re cracking/crumbling on both sides where they bend (around where your foot creases are the balls of your feet) and the heels are worn to the cork almost. I wear them almost extensively in warmer months so they have gotten some miles, but still would have liked to have had them longer. I do have a pair of Teva sandals though with the rubbery hiking style soles and they have lasted with almost no visible wear.