This product by Microsoft is of great quality:
- Perfect ergonomics for both right-handed than left-handed,
- The coating is very pleasant to touch,
- Very accurate,
- Reduced size through the hinge (a mouse of normal size for a small space when folded), the more it comes with a small packet of transportation,
- The small sensor comes to magnetize in the folded mouse
Only weak point, its price, over 40 wireless mouse, that's a lot, but I have to cross nearly 60 in supermarkets ...