I thought the strap was too tight at first too, like another reviewer.  But I was determined to get used to them, and got a blister from it, but they were worth the trouble.  Now I love them, and wear them everywhere, including to church.  They have great arch support, and are the perfect balance between supportive and cushy.  Though they do require a break-in period, they are well worth the trouble (including blisters) since they were so wonderfully comfortable after.