Summary: The grommet holding the lead is too stiff. It is meant to protect the lead from bending and cracking. Being too stiff it does this poorly. Otherwise it seems fine. I have not had it long, so I do not know how long it will last. I note at least one other reviewer had experienced a problem with the grommet (called sheath).
Summary: More detailed specification: USB optical mouse USB lead approx 1.5m length Suitable surfaces: Mouse mats, paper(even white paper)/cardboard or any non reflective surfaces Problems with the item in question: The mouse came misaligned and as such causing judders in the cursor, making it inappropriate for drawing/gaming.