Strongly downgrading my rating

Because of this added flaw, I am downgrading my rating to 2 stars

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

No complains as of yet

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.

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

I really can't find another mouse that works as

Works exactly as Id hoped

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

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

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

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

Still works as if brand new 3 Years later.