Positives:
+ Wireless but precise
+ Ergonomic design for long work
+ Moderate weight with 1 battery (2 possible but not required)
+ Software with automatic application discovery for me is a killer argument per Logitech
+ Sensor range is very good
+11 Programmable buttons allow nothing to be desired
+ Left and right mouse buttons have fine print dots
+ The batteries will last very long
To recognize + no bugs (as opposed to evil G400s)
+ Beautiful design
+ Zippy scroll wheel with fine screening
Negatives:
-The 6 side keys feel very angular. That's not very pleasant, but useful for orientation.
-Some Few keys can be heard loud but tolerable.
-The DPI switches are a bit loose einmontiert
-Price 63 is at the upper limit for the processing
Conclusion:
Who is Logitech software dependent, does everything right here. The shortcomings stand out not. For you!