I wanted to like these sandals - they have a soft, cushion that feels comfortable.  But the edge around that cushion is hard and abrupt, so if your feet slide around on the sandal, the edge gets irritating as you feet hit it.  Also, the velcro strap that you tighten doesn't seem to keep your feet from sliding around on the base, especially if you slipped them on over your socks.

Don't get them wet, because the foam cushion will soak up the water and is not easy to dry out -- same thing with sweat.

I usually wear a size 10.5-11 shoe, and the size 11 for this sandal barely fits... so order a 1/2 or full size larger than your tightest shoe.