I made a pair of huarache sandals using a kit from InvisibleShoe.com. Getting the lacing right is the hardest part.

Walking around in the yard they were incredible... bring on the sticks, pine cones, and sweetgum balls! However, on hard surfaces I could definitely feel the knot under the left foot to the point of being painful. The right foot was fine. It is probably due to that shoddy construction (by me!). I will try re-doing the left knot to see if it helps.

The cord between my toes was a little uncomfortable (I've never been a flip-flop fan) but I think I will get used to it. The sandals stay on the feet without any effort. Traction is good all-around and is a definite improvement over running barefoot on wet slimy boardwalks.