Space for nails needs to be larger
These work well for adding new life to shoes with uneven sole wear. Unfortunately, the space they created for the nails is not big enough to embed the nail head.  I mostly wear these outside, so it doesn't matter so much, but I have to remember to remove my shoes at the door so I don't get nail marks on my wood floor.  And if I walk on concrete outside the nail heads make a clacking noise.  Not sure if I can find other nails with heads small enough to fit in the space, but strong enough to hold the taps on to the shoe.
Rating: 3 stars