My son says they are semi comfortable. Its hardly accurate. The only thing Id change is that there is a slight slipping of my foot inside when I walk so may have to wear socks but still a great shoe. I even take my Bose ear buds out of my ears to leave my desk, so there has been no strain on this extender. 5 m. Arrived within expected date, carefully packaged. Only reason we had to buy new ones was size. Make sure to install crossbars appropriately or they will make a loud noise at speed above 25 mph. Very disappointing as I really wanted these to work. I only wore them a few days and theyre falling apart!