I also have the M90 Logitech and I recommend for 2 or 3 euros more thereof. I think a first prize "qualitative", this mouse is a very good reference. The materials are okay, nice good plastic, the wheel is no noise and is accurate and the optical pointer is better (more accurate, operates on raw wood, on a sofa in thick fabric etc ... The cord is 150 cm, the mouse 10 cm X 6 cm by 3.5 cm for its thickest part.
