fits my hand nicely and no hand cramps,the other one i had was cheaply made and logitech are way better quality,i love the fact it has 2 year battery

Perfect size and fits my hand great without any hand cramping or wrist pain from being on the computer for extended periods of time

Gave me hand cramps.

and I could feel my hand cramping after a while of use

I have a lot of check boxes I have to click and as fast as I can if I want to complete my assessment and move to another job.

I really can't find another mouse that works as

No complains as of yet

The USB keeps disconnecting during use for a second or two...really disappointed as I've had mouses that lasted *years

Still works as if brand new 3 Years later.

Only minor problem I have is the scroll button in the middle is not working to well as it did before, but might probably be the laptop, or I need to change battery soon

This was a replacement for an old M510 which stopped working as it kept double clicking automatically

Works exactly as Id hoped

Was great while it performed but after several months it was not as responsive as at first.

I did not do anything to damage as it was always safe on my desk

Apparently the contact beneath the left click (possibly the right as

I have a lot of check boxes I have to click and as fast as I can if I want to complete my assessment and move to another job.

I really can't find another mouse that works as

No complains as of yet

The USB keeps disconnecting during use for a second or two...really disappointed as I've had mouses that lasted *years

Still works as if brand new 3 Years later.

Only minor problem I have is the scroll button in the middle is not working to well as it did before, but might probably be the laptop, or I need to change battery soon

This was a replacement for an old M510 which stopped working as it kept double clicking automatically

Works exactly as Id hoped

Was great while it performed but after several months it was not as responsive as at first.

I did not do anything to damage as it was always safe on my desk

Apparently the contact beneath the left click (possibly the right as