The move away from broad soft-touch rubber is generally seen as better for stain resistance and long-term appearance. A few reviewers prefer the softer old coating or dislike the new...
Pros: software usability, software stability
Cons: double-click reliability, warranty
The matte coating resists fingerprints and provides decent grip, but it feels more functional than luxurious.
Pros: motion consistency, programmable buttons
Cons: palm grip comfort, hand support
The glossy finish looks polished but readily shows fingerprints, smudges, dirt, and surface scratches.
Pros: handedness options, grip texture
Cons: programmable buttons, macro support
The soft-touch coating feels good when new, but long-term feedback is consistently wary of staining, grime, discoloration, and surface wear. Lighter colors draw the most criticism.
Pros: motion consistency, left and right click quality
Cons: switch durability, onboard memory