The -:
- Heavy: 112 gr / AA battery ... but it seems yet light weight is unevenly distributed.
- Button "zoom" not convenient as spring-mounted (logical but not practical)
- No resolution setting (800 dpi)
I will add that my computer runs Wifi and there is interference on the flow of elevator operation: stop and then turning back ... or stop sudden jumps followed by several short, I plugged my computer over Ethernet and it apparently stopped this problem.
At first I suspected the receiver on my keyboard but I had enough away to avoid interference.
Other points:
I wish the keys "forward / back" on the left side of the key as the Nano.
Normal accuracy ..sans more.
