Its mindless grinding with little pay off. --Original Review--I should begin by saying that my feet are somewhat hard to fit -- narrow, with high arches and insteps and very narrow heels. These sandals were extremely disappointing. But instead, I simply paid extra for a piece of cardboard. My original lasted over 2 years. Nothing feels loose and everything still works without a single fault. After retiring insurance no longer covered the $500. 5 is perfect lengthwise but seems a tiny bit wide. I have two other small bluetooth speakers. Within five days of using the mouse, my son manage to slightly wear the plastic runners on the base of the mouse, so had to swiftly ding a largish mouse mat for his requirements.