While Func retained all of the great ergonomics of the MS-3, the R2 tweaks the working components a bit for better overall durability and further flexibility through its software. The Func MS-3 R2 now features software upgradeable firmware, a new more precise and durable scroll wheel, and Omron switches rated for 10 million clicks."
You do software updates to get the most from favourite programs right? Updating a motherboard BIOS can in a timely manner is also critical. The guide to Flashing a Motherboard BIOS spells out the often complicated steps in plain english. PCSTATS Tips