I use the Logitech G203 which is an older model and wired but I love this mouse, never had any issues. Its a bit smaller than some people like, its only a little bit bigger than the basic dell mouse.
I bring up my G203 because the G305 is physically built the same the main difference I see between the two (other than wireless) is that the G305 is using a newer sensor.
One thing to note about the G305 is that its not rechargeable and uses batteries which can definitely be a huge benefit or massive flaw!
Hopefully this helps a bit!